New config option (history_default_visible)

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@1837 f5dc347c-c33d-0410-90a0-b07cc1902cb9

doc/ChangeLog

@@ -141,6 +141,7 @@ Mantis ChangeLog
  * New config option (upload_project_file_threshold, upload_bug_file_threshold, allow_reporter_upload): control what users may upload what kinds of files
  * New config option (view_attachments_threshold): the access level required to view attachments.  This is useful when there is a need to share the knowledge about the defects, but to secure customer data.
  * New config option (view_summary_threshold): the access level required for viewing the summary page
+ * New config option (history_default_visible): whether bug history should be visible by default or only when requested.
  * New file (obsolete.php): checks for obsolete variables and tells the operator
  * Removed config option (allow_href_tags): see new option html_make_links
  * Removed config option (allow_html_tags): see new option html_valid_tags