Changelog

########################
Nagios Core 4 Change Log
########################

4.5.3 - 2024-06-11 
------------------
* Update jQuery (#960) (Dylan Anderson)   
* Remove pages using outdated AngularJS framework (#960) (Dylan Anderson)
* Fix html encoding of some ascii characters (#813) (Dylan Anderson)
* Updated several page links to use 'nofollow' (#965) - (Griffin Westerman)

4.5.2 - 2024-04-30
------------------
* Fix handling of timeperiods w/ downtime availability calculations in the Availability CGI report (Sebastian Wolf)
* Fix build when compiling against musl libc (#952) (Sebastian Wolf)
* Fix downtime comment using current time instead of the downtime's entry time (#910) (Dylan Anderson)

4.5.1 - 2024-02-28
-------------------
* Fix text rendering in Configuration -> Command Expansion when the command ends in whitespace (Thanks Joran LEREEC for reporting this issue) (Dylan Anderson) 

4.5.0 - 2023-11-16
-------------------
Note: this release is backward-compatible, but does include updates to the header files.
If you are using any NEB modules in your monitoring solution, you will need to recompile them with the new nagios-4.5.0 headers to avoid segmentation faults.
ENHANCEMENTS
* Add event_handler_period configuration option to hosts and services (#913) (Dylan Anderson)
* Add external commands CHANGE_HOST_EVENT_HANDLER_TIMEPERIOD and CHANGE_SVC_EVENT_HANDLER_TIMEPERIOD (#913) (Dylan Anderson)
* Added support for separating your build directory from your source directory (#867) (Doug Nazar)

4.4.14 - 2023-08-01
-------------------
* Fix missing macros when running performance data commands (#904) (Doug Nazar)

4.4.13 - 2023-06-01
-------------------
FIXES
* Fix broken logo images in status pages (regression from 4.4.12) (#917) (Harbie34)

4.4.12 - 2023-05-30
-------------------
FIXES
* Clean up most compiler warnings on GCC and clang (#901) (Doug Nazar)
* Fix incorrect HTML entity escaping in CGIs (#907, #902) (Doug Nazar, Sebastian Wolf)
* Fix issue where predictive dependency checks were not being scheduled for services (#908) (Sebastian Wolf)
* Fix several typos (#898, #884) (Harbie34, Josh Soref)

4.4.11 - 2023-04-14
-------------------
FIXES
* Fix incorrect error message in preflight check (#865) (Andre Klärner)
* Fix use-after-free in qh_deregister_handler (#866) (Doug Nazar)
* Fix memory leak in qh_deregister_handler (#866) (Doug Nazar)
* Fix mismatched host/service behavior when changing from SOFT to HARD state (#891) (Sebastian Wolf)
* Minor performance improvements in CGI utility functions (#866) (Doug Nazar)

4.4.10 - 2023-01-17
-------------------
FIXES
* Fix memory leak in nagiostats.c when using -c, -s, -d, or -D multiple times (#888) (ggvl)
* Improve service scheduling at startup (#887) (anetyn)
* Improve compilation/reduce warnings when using Clang 16 (#889) (Sam James)
* Improve compilation on other, stricter C99 compilers (#890) (Florian Weimer)

4.4.9 - 2022-11-16
------------------
FIXES
* Fixed check_attempts remaining high during a HARD service recovery (#837) (Sebastian Wolf)
* Fixed memory leak in NERD (#872) (ggvl)

4.4.8 - 2022-10-04
------------------
FIXES
* Minor interface updates
* Fixed crash when checking for updates using SSL (Doug Nazar)

4.4.7 - 2022-04-14
------------------
FIXES
* Fixed checkboxes in jsonquery.html (#778) (Rfferrao87)
* Added SSL support for version update check (Sebastian Wolf)
* Note: NEB modules using the priority/scheduling queues in libnagios may need to update headers due to symbol conflicts with OpenSSL.
* Fixed XSS in homepage when displaying update check results (Sebastian Wolf)
* Fixed allocation error in getcgi.c (#820) (Ariadne Conill)
* Fixed Error: NULL variable for lines of spaces in resource.cfg (#814) (Ralf Herrmann)
* Fixed crash when handling large check output (#825, #828) (Kilvador)
* Update packaging instructions for RPM/EPEL (#850) (T.J. Yang)
* Include packaging instructions for DEB (#842) (Catfriend1)
* Fixed CGI object processing when names end in \ (#819) (Sebastian Wolf)
* $SERVICEPROBLEMID$ now accessible when notifications are sent (#688) (Sebastian Wolf)

4.4.6 - 2020-04-28
------------------
FIXES
* Fixed Map display in Internet Explorer 11 (#714) (Scott Wilkerson)
* Fixed duplicate properties appearing in statusjson.cgi (#718) (Sebastian Wolf)
* Fixed NERD not building when enabled in ./configure (#723) (Sebastian Wolf)
* Fixed build process when using GCC 10 (#721) (Michael Orlitzky)
* Fixed postauth vulnerabilities in histogram.js, map.js, trends.js (CVE-2020-13977) (Thanks UraSec Team) (Sebastian Wolf)
* When using systemd, configuration will be verified before reloading (#715) (tatref)
* Fixed HARD OK states triggering on the maximum check attempt (#757) (Sebastian Wolf)

4.4.5 - 2019-08-20
------------------
FIXES
* Reverted changes related to #625 due to CPU load issues
* Partially reverted changes for #647 due to CPU load issues
* Fixed "Quick Search" so that leading/trailing whitespace doesn't affect output (#681) (Sebastian Wolf)
* Fixed build issues on non-RPM-based platforms (#617) (T.J. Yang)

4.4.4 - 2019-07-29
------------------
FIXES
* Fixed log rotation logic to not repeatedly schedule rotation on a DST change (#610, #626) (Jaroslav Jindrak & Sebastian Wolf)
* Fixed $SERVICEPROBLEMID$ to be reset after service recovery (#621) (Sebastian Wolf)
* Fixed defunct worker processes appearing after nagios was reloaded (#441, #620) (Sebastian Wolf)
* Fixed main nagios thread to release nagios.qh on a closed connection (#635) (Sebastian Wolf)
* Fixed semicolon escaping to remove prepended backslash (\) (#643) (Sebastian Wolf)
* Fixed 'Checks of this host have been disabled' message showing on passive-only hosts (#632) (Vojtěch Širůček & Sebastian Wolf)
* Fixed last_hard_state showing the current hard state when service status is brokered (#633) (Sebastian Wolf)
* Fixed long plugin output (>8KB) occasionally getting truncated (#625) (Sebastian Wolf)
* Fixed check scheduling for objects with large check_intervals and small timeperiods (#647) (Sebastian Wolf)
* Fixed SOFT recoveries sending when services had HARD recovery some time after host recovery (#651) (Sebastian Wolf)
* Fixed incorrect permissions on debugging builds of FreeBSD (#420) (Sebastian Wolf)
* Fixed NEB callback lists being partially orphaned when multiple modules subscribe to one callback (#590) (Sebastian Wolf)
* Fixed memory leaks in run_async_service_check(), run_async_host_check() when checks are brokered (#664) (Sebastian Wolf)
* Fixed potential XSS in main.php, map.php (#671, #672) (Jak Gibb)
* Removed NEB brokering for nagios daemonization, since daemonization occurs before NEB initialization (#591) (Sebastian Wolf)


4.4.3 - 2019-01-15
------------------
FIXES
* Fixed services sending recovery emails when they recover if host in down state (#572) (Scott Wilkerson)
* Fixed a make error when building on the aarch64 architecture (#598) (Gareth Randall)
* Fixed --with-cgibindir and --with-webdir to actually set values given (#585) (lawsontyler)
* Fixed soft recovery states for services (#575) (Jake Omann)
* Fixed XSS vulnerability in Alert Summary report (CVE-2018-18245) (Jake Omann)
* Fixed services in soft states sometimes not switching into hard states (#576) (Jake Omann)
* Fixed last_state_change to update when a state goes from soft -> hard state (#592) (Jake Omann)
* Fixed Map link always being set to undefined host and don't show link for Nagios Process root note (#539) (Jake Omann)
* Fixed notifications sending when services went into hard state on a down or unreachable host (#584) (Jake Omann)
* Fixed log_host_retries not logging the host soft state checks (#599) (Jake Omann)
* Fixed stalking_options N option to properly log only when a notification is actually sent (#604) (Jake Omann)
* Fixed issue with service status totals being zero when servicegroup=all on servicegroup status page (#579) (Jake Omann)
* Fixed escalation notifications logic and recovery notifications not going out (#582) (Jake Omann)
* Fixed not finding child index causing duplicate hosts showing in the Map (#471) (Jake Omann)
* Fixed Map configuration popup checkboxes not working and Root Node not populating (#543) (Jake Omann)
* Fixed cleanup and deinit of neb modules on reload (#573) (Jake Omann)


4.4.2 - 2018-08-16
------------------
FIXES
* Fix comment data being duplicated after a `service nagios reload` or similar (#549) (Bryan Heden)
* Fix check_interval and retry_interval not changing at the appropriate times (#551) (Scott Wilkerson)
* Fixed passive checks sending recovery email when host was previously UP (#552) (Scott Wilkerson)
* Fixed flapping comments duplication on nagios reload (#554) (Christian Jung)
* Fix for CVE-2018-13441, CVE-2018-13458, CVE-2018-13457 null pointer dereference (Trevor McDonald)
* Fixed syntax error in file: default-init.in (#558) (ccztux)
* Reset current notification number and state flags when the host recovers, reset all service variables when they recover fixes (#557) (Scott Wilkerson)
* Fixed wrong counting of service status totals when showing servicegroup details (#548) (ccztux, Bryan Heden)
* Fixed avail.cgi not printing CSV output when checkbox is checked (for any type: host/service/hostgroup/servicegroup) (#570) (Bryan Heden)
* Fixed nagios not logging SOFT state changes after 1 (Scott Wilkerson)


4.4.1 - 2018-06-25
------------------
FIXES
* Revert some macro->kvvec changes causing problems when `enable_environment_macros` was enabled (Bryan Heden)
* Adjust `process_macro_r` function logic so that it handles macros properly (Bryan Heden)
* Fix spec file for systemd (Karsten Weiss, Fr3dY, Bryan Heden)
* Fix bug where `ssize_t` typedef to int on some systems (Bryan Heden)


4.4.0 - 2018-06-19
------------------
ENHANCEMENTS
* new status for check dependencies (John Frickson)
* Allow more flexible requirements for comments (John Frickson)
* Add a `statusCRITICALACK` class for the status column (John Frickson)
* CSV output based on groups (all options) (John Frickson)
* New Macro(s) to generate URL for host / service object to be used in notifications (John Frickson)
* New Macro(s) to determine if host/service notifications are enabled (#419) (Bryan Heden)
* New Macro(s) for obtaining the host/service notification periods (#350) (Bryan Heden)
* enable_page_tour interface option (Bryan Heden)
* Code cleanups in important sections (Workers, Handling Results) (Bryan Heden)
* Automatic mail program detection (with same /bin/mail failback) (Bryan Heden)
* Incorporated [autoconf-macros](https://github.com/NagiosEnterprises/autoconf-macros) into Core (Bryan Heden)
* Lots of enhancements/additions to configure/make process. (Bryan Heden)
    * Moved all files to startup/
    * Added upstart job
* Added system limit detection (RLIMIT_NPROC) to check for anticipated fork() failures (#434) (Bryan Heden)
* Added stalking on notifications (`N` or `notifications` option when specifying `stalking_options`) (#342) (Bryan Heden)
* Added automatic `systemctl daemon-reload` and `initctl reload-configuration` where applicable on `make install-init` (Bryan Heden)
* Added case-insensitive command submission. (#373) (Bryan Heden)
* Enabled `check_external_commands` by default (Bryan Heden)

FIXES
* Command line macro detection skips potential macros with no ending dollar sign (Bryan Heden, Jake Omann)
* Fixed a lockup condition sometimes encountered on shutdown or restart (Aaron Beck)
* Fixed negative time offset calculations computing incorrectly sometimes (bbeutel)
* Fixed reloads causing defunct (zombie) processes (#441) (Bryan Heden)
* Fixed wait3(), wait4() implementations (replaced with waitpid()) (#326) (Bryan Heden)
* Fixed additive inheritance not testing for duplicates in hosts/services/(+escalations) (#392) (Bryan Heden)
* Fixed very very (around 600k chars or greater) large plugin output crashing Nagios (#432) (Bryan Heden)
* Fixed first_notification_delay not beeing calculated from last_hard_state_change (#425) (ccztux)
* Fixed duplicate downtime ID occurring from downtimes in retention file (#506) (Franz [feisenko])
* Fixed segfault when navbarsearch was used in status.cgi for something other than a host (#489) (Bryan Heden)
* Fixed some miscellaneous ./configure issues on Solaris (Bryan Heden, Troy Lea)
* Fixed "Locate host on map" link (#496) (Troy Lea)
* Fixed service groups defined with unknown service members (that aren't first in the list) not erroring out (#500) (Bryan Heden)
* Fixed tac.cgi to have consistent behavior with the other cgis (#481) (Bryan Heden, Matt Capra)
* Fixed clear_host/service_flapping command logic to broker/notify properly (#525) (Bryan Heden, Karsten Weiss)


4.3.4 - 2017-08-24
------------------
* Improved config file parsing (Mark Felder)
* Fixed configure script to check for existence of /run for lock file (in regards to CVE-2017-12847, Bryan Heden)
* Use absolute paths when deleting check results files (Emmanuel Dreyfus)
* Add sanity checking in reassign_worker (sq5bpf)


4.3.3 - 2017-08-12
------------------
* xodtemplate.c wrong option-deprecation code warning (alex2grad / John Frickson)
* On-demand host check always use cached host state (John Frickson)
* 'á' causes Service Status Information to not be displayed (John Frickson)
* New Macro(s) to generate URL for host / service object (John Frickson)
* Fix minor map issues (Troy Lea)
* Fix lockfile issues (Bryan Heden)
* Switch order of daemon_init and drop_privileges (CVE-2017-12847, Bryan Heden)
* Add an OpenRC init script (Michael Orlitzky)


4.3.2 - 2017-05-09
------------------
FIXES
* Every 15sec /var/log/messages is flooded with "nagios: set_environment_var" (John Frickson)
* Changed release date to ISO format (yyyy-mm-dd) (John Frickson)
* `make all` fails if unzip is not installed (John Frickson)
* Quick Search no longer allows search by Alias (John Frickson)
* flexible downtime on a service immediately turns off notifications (John Frickson)
* Fix to allow url_encode to be called twice (Z. Liu)
* Update timeperiods.cfg.in (spelling) (Parth Laxmikant Kolekar)
* Spelling fixes (Josh Soref)
* Vent command pipe before remove to avoid deadlocks on writing end (Kai Kunstmann)
* CGI utility cgiutil.c does not process relative config file path names properly (John Frickson)
* xdata/xodtemplate.c bug in option-deprecation code (John Frickson)
* Wildcard searching causes service status links to not work properly (John Frickson)
* Quick search with no hits shows a permission denied error (John Frickson)
* Setting a service as its own parent is not caught by the sanity checker (-v) and causes a segfault (John Frickson)


4.3.1 - 2017-02-23
------------------
FIXES
* Service hard state generation and host hard or soft down status (John Frickson)
* Comments are duplicated through Nagios reload (John Frickson)
* host hourly value is incorrectly dumped as json boolean (John Frickson)
* Bug - Quick Search no longer allows search by IP (John Frickson)
* Config: status_update_interval can not be set to 1 (John Frickson)
* Check attempts not increasing if nagios is reloaded (John Frickson)
* nagios hangs on reload while sending external command to cmd file (John Frickson)
* Feature Request: return code xxx out of bounds - include message as well (John Frickson)


4.3.0 - 2017-02-21
------------------
SECURITY FIXES
* Fix for CVE-2016-6209 - The "corewindow" parameter (as in
  http://localhost/nagios?corewindow=www.somewhere.com) has been disabled by
  default. See the UPGRADING document for how to enable it. (John Frickson)

FIXES
* Fix early event scheduling (pmalek / John Frickson)
* on-demand host checks triggered by service checks cause attempt number increments (fredericve)
* Service notification not being send when host is in soft down state (John Frickson)
* configure does not error if no perl installed on CentOS 7 (John Frickson)
* failed passive requests leave .ok files in checkresults dir (caronc)
* Services don't show in status.cgi if "noheader" specified (John Frickson)
* Standardized check interval config file names (John Frickson)
* "Event Log" (showlog.cgi) could not open log file (John Frickson)
* "nagios_check_command" has been deprecated since v3.0. Last vestiges removed (John Frickson)

ENHANCEMENTS
* Added new flag to cgi.cfg: tac_cgi_hard_only to show only HARD states (John Frickson)
* Add broker-event for the end of a timed event (NEBTYPE_TIMEDEVENT_END) (John Frickson)
* There is no Macro to retrieve addresses of hostgroup members (now $HOSTGROUPMEMBERADDRESSES$) (John Frickson)
* Add "Page Tour" videos to several of the core web pages (John Frickson)
* Added a login page, and a `Logoff` links (John Frickson)
* On the status map, the host name will be colored if services are not all OK. (John Frickson)
* Added "Clear flapping state" command on host and services detail pages. (John Frickson)
* User-entered comment now displays below generated comment for downtime (John Frickson)


4.2.4 - 2016-12-07
------------------
SECURITY FIXES
* Fixed another root privilege escalation (CVE-2016-9566) Thanks for bringing this
  to our attention go to Dawid Golunski (http://legalhackers.com).


4.2.3 - 2016-11-21
-------------------
SECURITY FIXES
* Fixed a root privilege escalation (CVE-2016-8641) (John Frickson)

FIXES
* external command during reload doesn't work (John Frickson)
* Nagios provides no error condition as to why it fails on the verify for serviceescalation (John Frickson)
* No root group in FreeBSD and Apple OS X (John Frickson)
* jsonquery.html doesn't display scheduled_time_ok correctly (John Frickson)
* daemon_dumps_core=1 has no effect on Linux when Nagios started as root (John Frickson)
* Configuration check in hostgroup - misspelled hostname does not error (John Frickson)
* contacts or contact_groups directive with no value should not be allowed (John Frickson)
* Compile 64-bit on SPARC produces LD error (John Frickson)
* HOSTSTATEID returns 0 even if host does not exist (John Frickson)
* Submitting UNREACHABLE passive result for host sets it as DOWN if the host has no parents (John Frickson)
* nagios: job XX (pid=YY): read() returned error 11 (changed from LOG_ERR to LOG_NOTICE) (John Frickson)
* Fix for quick search not showing services if wildcard used (John Frickson)


4.2.2 - 2016-10-24
------------------
SECURITY FIXES
* There was a fix to vulnerability CVE-2008-4796 in the 4.2.0 release on
  August 1, 2016. The fix was apparently incomplete, as there was still a
  problem. However, we are now getting all RSS feeds using AJAX calls
  instead of the (outdated) MagpieRSS package. Thanks for bringing this to
  our attention go to Dawid Golunski (http://legalhackers.com).

ENHANCEMENTS
* Update status.c to display passive check icon for hosts when passive checks
	are enabled and actives disabled (John Frickson)

FIXES
* Fix permissions for Host Groups reports (status.cgi) (Patrik Halfar)
* Service Parents does not appear to be functioning as intended (lev)
* Availability report mixes up scheduled and unscheduled warning percentages (Helmut Mikulcik)
* Invalid values for saved_stamp in compute_subject_downtime_times() (John Frickson)
* Remove deprecated "framespacing" (John Frickson)
* The nagios tarball contains two identical jquery copies (John Frickson)
* extinfo.cgi does not set content-type (most cgi's don't) (John Frickson)
* Timeperiods are corrupted by external command CHANGE_SVC_CHECK_TIMEPERIOD (xoubih)
* Quick search doesn't show hosts without services (service status detail page) (John Frickson)
* In host/services details view, if exactly 100 entries would not show last one (John Frickson)
* nagios host URL parameter for NEW map doesn`t work - Network Map for All Hosts (John Frickson)
* next_problem_id is improperly initialized (gherteg)
* Passive problems not showing as "unhandled" (John Frickson)
* September reported as Sept instead of Sep (Rostislav Opočenský)
* Notifications are not sent for active alerts after scheduled downtime ends (John Frickson)
* Nagios 4.2.0 not working on Solaris (John Frickson)
* install-exfoliation and install-classicui don't work FreeBSD and Mac OS X (John Frickson)
* Updated makefile to delete some no-longer-needed files (John Frickson)


4.2.1 - 2016-09-06
------------------
FIXES
* Fix undefined variable php error (John Frickson)
* Links on the sidebar menu under 'Problems' are indented too far (John Frickson)
* Using $ARGn$ Macros in perfdata (John Frickson)
* using a wildcard in search returns service status total all zero's (John Frickson)
* read_only does not take priority (deppy)
* Running nagios -v on 4.2.0 takes 90+ seconds (John Frickson)
* Bare "make" invoked in subtarget (mjo)
* Theme images/stylesheets installed with inconsistent permissions (mjo / John Frickson)
* Missing Image for Host and Service State Trends in Availability Report (nichokap / John Frickson)
* Maintain non-persistent comments through reload (John Frickson)
* Servicegroup availability report ignores includesoftstates in service report links (PriceChild)
* error: format not a string literal and no format arguments (Karsten Weiss)
* Synced config.guess and config.sub with GNU (Zakhar Kleyman)


4.2.0 - 2016-08-01
------------------
SECURITY FIXES
* Fixed vulnerability CVE-2008-4796 (John Frickson)
* Fixed vulnerability CVE-2013-4214 (John Frickson)
* web interface vulnerable to Cross-Site Request Forgery attacks (John Frickson)

ENHANCEMENTS
* Increase socket queue length for listen()
* Added host name to the website page title (leres / John Frickson)
* Added additional icons for NetBSD and SuSE (John Frickson)
* The new Status Map will now use cgi.cfg options (John Frickson)
    default_statusmap_layout will default to "6" for the new map
* The new Status Map will now show some valid values in the popup for "Nagios Process" (John Frickson)

FIXES
* Network outage view without access to all hosts (John Frickson)
* Core workers looping (John Frickson)
* service query returns duplicate host_name and description fields in the returned data (John Frickson)
* HTML output of plug-ins is parsed in wrong way => webgui unusable (John Frickson)
* Command worker fails to handle SIGPIPE
* "View Status" links under "Map" broken in Nagios Core Version 4.1.1 (John Frickson)
* Can't send big buffer - wproc: Core Worker seems to be choked (velripn / John Frickson)
* Too big CPU load on FreeBSD and other systems using poll() interface (cejkar)
* Flexible downtime recorded as unscheduled downtime (John Frickson)
* Service Flexible downtimes produce 1 notification before entering (John Frickson)
* Once you "set flap_detection_enabled 0" it should remove flapping state from the host/services page (John Frickson)
* New map doesn't finish loading if a logo image is not found (John Frickson)
* Extraneous Div end tag in map.html (Scott Wilkerson)
* Issue with "Problems" section (John Frickson)
* Status Map icons and online/offline status dots disappear in IE11 (John Frickson)
* New network map overlays the nagios process with objects (John Frickson)
* Added Default-Start and Default-Stop to the init script (John Frickson)
* Compile / logging issues with BSD 6
* Related to above, Fixed a lot of incorrectly handled time_t's in *printf's (John Frickson)
* New map not working for RU locale (actually, most locales) (John Frickson)
* Replaced all instances of signal() with sigaction() + blocking (John Frickson)
* UTF-8 characters like german ä are not processed properly by function url_encode (John Frickson)
* nagios worker processes can hog CPU (huxley / John Frickson)
* custom time periods that include special characters were not being handled in reports (John Frickson)
* Fixed init script to wait up to 90 seconds then kill the nagios process (John Frickson)
* No Host Groups results in wrong error message (John Frickson)
* Setup Nagios users to view specific host is not working in the new network map (John Frickson)
* statusjson.cgi fails glibc realloc truncate response output (John Frickson)
* Report Time Period does not work if an @ character is in the timeperiod name (John Frickson)
* State History does not use actual plugin long_output (John Frickson)
* Time period corruption (xoubih)
* Tactical Overview - Disabled Flap Detection Link (John Frickson)

4.1.1 - 08/19/2015
------------------
FIXES
* CGI Could not read object configuration data (broken by error in 4.1.0)
* exclude (!) not working (broken by mis-applied fix for 4.1.0)


4.1.0 - 08/18/2015
------------------
ENHANCEMENTS
* Promoted JSON CGIs to released status (Eric Stanley)
* New graphical CGI displays: statusmap, trends, histogram (Eric Stanley)
* Make sticky status for acks and comments configurable enhancement #20 (Trevor McDonald / Scott Wilkerson)
* Add host_down_disable_service_checks directive to nagios.cfg #44 (Trevor McDonald / Scott Wilkerson)
* httpd.conf doesn't support Apache versions > 2.3 (DanielB / John Frickson)

FIXES
* Fix for not all service dependencies created (John Frickson)
* Fix SIGSEGV with empty custom variable (orbis / John Frickson)
* Fix contact macros in environment variables (dvoryanchikov)
* Fixed host's current attempt goes to 1 after going to hard state (John Frickson)
* Fixed two bugs/problems: Replace use of %zd in base/utils.c & incorrect va_start() in cgi/jsonutils.c (Peter Eriksson)
* Fixed: Let remove_specialized actually remove all workers (Phil Mayers)
* Fixed log file spam caused when using perfdata command directives in nagios.cfg (shashikanthbussa)
* Fixed off-by-one error in bounds check leads to segfault (Phil Mayers)
* Added links for legacy graphical displays (Eric Stanley)
* Update embedded URL's to https versions of Nagios websites (scottwilkerson)
* Fixed doxygen comments to work with latest doxygen 1.8.9.1 #30 (Trevor McDonald)
* Fixed makefile target "html" to PHONY to fix GitHub issue #28 (Trevor McDonald)
* Fixed typo as per GitHub issue #27 (Trevor McDonald)
* Fixed jsonquery.php 404 not found error, and disabled Send Query button until form populates #43 (Scott Wilkerson)
* Fixed linking in Tactical Overview for several of the Host entries in Featured section #48 (Scott Wilkerson)
* Fixed passing limit and sort options to pagination and sort links #42 (Scott Wilkerson)
* Added form field for icon URL and clean-up when it changes in CGI Status Map. (Eric Stanley)
* Added options to cgi.cfg to uncheck sticky and send when acknowledging a problem (Trevor McDonald)
* Low impact changes to automate the generation of RPMs from nagios.spec file. (T.J. Yang)
* Update index.php (Trevor McDonald)
* Fixed escaping of corewindow parameter to account for possible XSS injection (Scott Wilkerson)
* Typo correction (T.J. Yang)
* Make getCoreStatus respect cgi_base_url (Moritz Schlarb)
* Adjusted map layout to work within frames (Eric Stanley)
* Fixed map displays are now the full size of browser window (Eric Stanley)
* Fixed labels and icons on circular markup no longer scale on zoom (Eric Stanley)
* Got all maps except circular markup working with icons (Eric Stanley)
* Fixes to make legacy CGIs work again. (Eric Stanley)
* Fixes to make all/html target tolerant of being run multiple times (Eric Stanley)
* For user-supplied maps, converted node group to have transform (Eric Stanley)
* Fixed issue transitioning from circular markup map to other maps (Eric Stanley)
* Fix displayForm to trigger on the button press (Scott Wilkerson)
* Fix fo getBBox crash on Firefox (Eric Stanley)
* Fixed map now resets zoom when form apply()'d (Eric Stanley)
* Fixed so close box on dialogs actually closes dialog (Eric Stanley)
* Corrected directive in trends display (Eric Stanley)
* Fixed minor issue with link in trends links (Eric Stanley)
* Fixed issue with map displaying on Firefox (Eric Stanley)
* Added exclusions for ctags generation (Eric Stanley)
* Update map-popup.html (Scott Wilkerson)
* Initial commit of new graphical CGIs (Eric Stanley)
* Fixed GitHub bug #18 - archivejson.cgi returns wrong host for state change query (Eric Stanley)
* Status JSON: Added next_check to service details (Eric Stanley)
* Fixed escaping of keys for scalar values in JSON CGIs (Eric Stanley)
* build: Include <sys/loadavg.h> if it exists. (Eric J. Mislivec)
* lib-tests: test-io{cache|broker} need -lsocket to link. (Eric J. Mislivec)
* lib-tests: test-runcmd assumes GNU echo. (Eric J. Mislivec)
* lib-tests: Signal handlers don't return int on most platforms, and using a cast was the wrong way to resolve this. (Eric J. Mislivec)
* Fix some type/format mismatch warnings for pid_t. (Eric J. Mislivec)
* Fix build on Solaris. (Eric J. Mislivec)
* runcmd: Fix build when we don't HAVE_SETENV. (Eric J. Mislivec)
* Fixed checkresult output processing (Eric Mislivec)
* Corrected escaping of long output macros (Eric Mislivec)
* Fixed null pointer dereferences in archive JSON (Eric Stanley)
* Fixed memory overwrite issue in JSON string escaping (Eric Stanley)
* JSON CGI: Now escaping object and array keys (Eric Stanley)

KNOWN ISSUES
* New map does not account for multiple parents, leaving "legacy" map as an option in the menu

4.0.8 - 08/12/2014
------------------
ENHANCEMENTS
* Removed 8 kB string size limitation in JSON CGIs (Eric Stanley)
* Re-implemented auto-rescheduling of checks (Eric Mislivec)
* Avoid bunching of checks delayed due to timeperiod constraints (Eric Stanley)
* Limit the number of autocalculated core workers to not spawn too many on large systems (Eric Mislivec, Janice Singh)

FIXES
* Removed quotes from numeric duration values in JSON CGIs (Eric Stanley)
* Fixed escaping in JSON CGIs so all required characters are escaped, and in the correct order (Eric Stanley)
* Fixed segfault in archive JSON CGI when plugin output was empty (Eric Stanley)
* Fixed several possibilities for buffer overflow (Eric Mislivec, Dirkjan Bussink)
* Fixed Tracker #582, #626: Handle VAR=VAL assignments at the start of simple commands (Eric Mislivec, Phil Randal)
* Fixed Tracker #630: Recognize '<' and '>' as redirection operators (Eric Mislivec)
* Corrected worker communication protocol documentation (Phil Mayers)
* Fixed init script to leave config test log in a better location, let sysconfig override init script variables, and not remove nagios.cmd when attempting to start with another instance running (Eric Mislivec, Robin Kearney)
* Fixed Tracker #361: Downtime notifications not displayed properly (Andrew Widdersheim)

4.0.7 - 06/03/2014
------------------
ENHANCEMENTS
* Added value of custom variables to Object JSON output for hosts, services and contacts (Eric Stanley)

FIXES
* Fixed bug #616: Unescape plugin output read from checkresult files, fix multiline perf data concatenation, and avoid extra memory allocation and copies. (Eric Mislivec)
* Fixed bug #609: Image on home page doesn't have correct image path prefix. (Derek Brewer)
* Fixed bug #608: Extra newline in service check timeout output string. (Mauno Pihelgas)
* Fixed bug #596: Crashes checking contact authorization for host escalations. (Alexey Dvoryanchikov - duplicates #590, #586)
* Fixed bug #496: Syntax error in exfoliation's common.css. (Karsten Weiss)

4.0.6 - 04/29/2014
------------------
ENHANCEMENTS
* Added name of authenticated user to JSON CGI results object (Eric Stanley)
* Added Nagios Core version to the Status JSON CGI programstatus query (Eric Stanley)
* Added daemon status to main page (Eric Mislivec)

FIXES
* Fixed bug #600: Service Check Timeout State always returns OK (0) status (Mauno Pihelgas, Eric Stanley)
* Fixed bug #583: Status Check Output of (No output on stdout) stderr: (Eric
Stanley - duplicate of bug #573)
* Fixed bug #573: Service checks returns (No output on stdout) stderr (Eric Stanley)
* Fixed bug #438: Reloads during downtime causes wrong availability calculations (Eric Stanley)
* Fixed feed updates when daemon can not access external networks (Eric Mislivec)
* Archive JSON: Fixed bugs calculating availability (Eric Stanley)
* Archive JSON: Allow missing logs to be skipped (Eric Stanley)

4.0.5 - 04/11/2014
------------------
* Fixed bug #595: Nagios 4 security fix (Alexey Dvoryanchikov, Eric Stanley)
* Fixed bug #594: Nagios 4 fix contactgroups parsing (Alexey Dvoryanchikov, Eric Stanley)
* Fixed bug #577: Nagios 4 checks stalled when write to socket failed (Alexey Dvoryanchikov)
* Fixed bug #580: Nagios 4 memory leak (Eric Stanley)
* Fixed init script to remove the switching of users when performing configuration verification which was causing failures if nagios user was set to nologin (Scott Wilkerson)
* Fixed auto creation of RAMDISK via environment variables in init script to properly check existence using $RAMDISK_DIR environment variable. (Scott Wilkerson)
* Fixed unreferenced variable NagiosVarDir in daemon-init (Eric Mislivec)
* Fixed bug where audio alerts wouldn't work with a 0 height and width - https://support.nagios.com/forum/viewtopic.php?t=26387 (Scott Wilkerson)

4.0.4 - 03/14/2014
------------------
ENHANCEMENTS
* JSON CGIs moved to beta status (Eric Stanley)

FIXES
* Fixed bug #491,#553: Rebuilt the daemon-init scripts back to something that should work on all systems (Scott Wilkerson)


4.0.3 - 02/28/2014
------------------
ENHANCEMENTS
* Aliased hourly_value to importance and minimum_value to minimum_importance and deprecated the former (Eric Stanley)
* Added host and service importance macros (Eric Stanley)
* Added notifications on flexible downtime expiration (Dan Wittenberg)

FIXES
* Bug #548: Temporary fix that rejects all external command during restart to prevent Core from crashing (Eric Stanley)
* Corrected calculation of host importance and importance defaults (Eric Stanley)
* Fixed bug #498: Nagios 4 enable_environment_macros=1 not working (Eric Stanley, Alexey Dvoryanchikov)
* No longer checks whether logs can be written when verifying configuration (Eric Stanley)
* Fixed CGI bug where the CGI could read past the end of the list of CGI variables, potentially crashing the CGI (Scott Wilkerson)
* Fixed inheritance of hourly_value from host and service templates (Scott Wilkerson)
* Fixed bug #502: 4.0.0: Configuration -> Service Escalations = incomplete list (Eric Stanley)
* Fixed bug #523: quotes and double quotes in plugin message are converted to HTML escapes in Nagios 4.0 (duplicate of bug #524)
* Fixed bug #524: URLs returned in plugin check results are not correctly displayed (Eric Stanley)
* Fixed bug where passive service checks would return "Service check timed out after 0.00 seconds" (Scott Wilkerson)

4.0.2 - 11/25/2013
------------------
FIXES
* Fixed bug 528: Nagios 4.0.1: Logrotation: Only current host- and servicestates saved in rotated logfiles (duplicate of 507)
* Fixed bug 507: Nagios 4.0.0 - Problem during log rotate (Stefano Ghelfi)
* Fixed bug 530: RPM spec file sets wrong permissions on plugins directory (duplicate of bug 494)
* Fixed bug 494: nagios.spec fixes (with patch) (Karsten Weiss)
* Fixed bug 515: Segsegv after starting up nagios (duplicate of bug 526)
* Fixed bug 513: Crash while entering downtime for service (duplicate of bug 526)
* Fixed bug 529: Core Worker failed to reap child in 4.0.1 Description
* Fixed bug 514: scheduled downtime not showing in web interface (Eric Stanley)
* Fixed bug 526: sort_downtime() corrupts scheduled_downtime_list causing segfault (Adam James)
* Fixed bug 492: Nagios 4 fails to remove/add checks upon reload (Eric Stanley)
* Fixed Bug 484: Beta4.0.0b4 service checks returning (No output on stdout) (Eric Stanley)
* Fixed Bug 470: statusmap doesn't display info (Cameron Moore)
* Fixed Bug 499: Security issue in daemon-init.in, function check_config (Tómas Edwardsson)

4.0.1 - 10/15/2013
------------------
ENHANCEMENTS
* Added compiler flags in RPM spec file to reduce compiler noise (Dan Wittenberg)
* Added logging of failure in dlclose() call (Anton Lofgren)
* Added a simple query handler interface, nagios-qh.rb (Dan Wittenberg)
* Multiple code simplifications, additional error handling in downtime code (Andreas Ericsson)

FIXES
* Reverted commit f99a9a7b which set check_interval to 1 if it was configured as zero.
* Corrected order of arguments when logging unknown hosts/services (Scott Wilkerson)
* Downtime initialized before retention data read (Eric Stanley)
* Patches to make RPM build again (Dan Wittenberg)
* Ensure that scheduled_downtime_depth never drops below zero (Andreas Ericsson)

4.0.0 - 09/20/2013
------------------
See https://assets.nagios.com/downloads/nagioscore/docs/nagioscore/4/en/whatsnew.html for a
list of the changes in Nagios Core 4