v3.6.0

Changed block tracking
Nutanix support

CA-222124: Handle race-condition in tap-ctl spawn
CA-223652: Add delay to reduce number of syslog messages
CA-227162: Enable tapdisk forced shutdown mode
CA-220042: sigact.sa_mask is not initialized (CID:57552)
CA-217394: Handle scheduler uuid data type overflow in tapdisk
CP-18038: Fix multiple resource leaks
CA-221904: vhd create EINVAL, report errors
Add a check to force O_DSYNC if needed
CA-220042: adding error handler for sigemptyset() function
CA-225067: tap_ctl_{spawn,create}: move tapdisk to cgroup slice
Fix udev rules to prevent td devices being bound by Dom0 services
CA-220608: Corrected potential memory leak
CA-250385: Check if vbd image is in chain, before retrieving
CA-220510: Initialsed vhd_file_table pointer before use
CP-23825: Structure lvm-util as a business logic library with an execution wrapper
CA-260195 Only log once for watchdog timeout
CA-254690: Add a flag to control logging based on call context
CA-260298 Add the device to invalid pe_start error message
CP-26852: Support building with upstream Linux
CA-277128: remove redundant, broken RRD code from tapdisk

0.9.1: CA-124991: Produce v1 RRDs for I/O errors and next VHD block

Signed-off-by: Jon Ludlam <jonathan.ludlam@eu.citrix.com>
Signed-off-by: Thanos Makatos <thanos.makatos@citrix.com>
Reviewed-by: Vineeth Thampi Raveendran <vineeth.thampi@citrix.com>

GitHub: closes #66 on xapi-project/blktap

0.9.0: SCTX-1536: Option to use the back-up footer instead of the primary one.

Signed-off-by: Thanos Makatos <thanos.makatos@citrix.com>
Reviewed-by: Keith Petley <keith.petley@citrix.com>

GitHub: closes #55 on xapi-project/blktap