Sync RELEASE-NOTES-1.22 between master and REL1_22

Part I: master

Also moved entry about recentchanges table to 1.23 since it's not in the 1.22 release.

Change-Id: I5113828701fde7d21c81ef3219d04202a9073f00
Merge "Sync RELEASE-NOTES-1.22 between master and REL1_22"