Fixes:

• Rare sporadic segfaults in test for core-6142 on windows. FB-8215.
• Fix alter domain with dependent views. RS-197244, RS-170899.
• When a worker attachment is released, clear its metadata cache. RS-197357.
• Database access error when nbackup is starting. FB-8237.
• Use "SQLSTATE" file blob read error. RS-195051.
• Corrects incorrect operation of the "blob" key of the "gstat" utility. RS-140253.
• Change integer config values bounds to FB_UINT64 data type and fix int64 max values printing. RS-192945.
• Fix aggtrace hash to take the database name into account. RS-194163.

Improvements:

• Add ability to get aggtrace plugin version via service. RS-199412.
• Add sum counter to all perf counters. RS-199411.
• Cache pid in trace plugin. RS-140983.
• Added shutdown handler for server. FB-8165.
• Set default stop timeout in systemd unit as 31 minute (guardian timeout + 1 minute). RS-170296.
• Increase limits for opened files and created processes in systemd unit file. RS-188825.
• Improvements to cancel_on_error option after testing. RS-182080.
• Use absolute paths in systemd service, because some distros can miss proper PATH. RS-187450.