* stable-3.0:
Fix method name to register custom event types in plugins
Don't send mails on publish change edits for WIP changes
PatchSetInserter: allow to set "sendEmail" bit
Set version to 2.16.17-SNAPSHOT
Set version to 2.16.16
CreateChange#getCommitMessage: Remove unused parameters and variable
Remove MessageOfTheDay extension
Revert "Add MessageOfTheDay-entries to ServerInfo"
Revert "Add UI element to display messages of the day"
Revert "Document MessageOfTheDay extension"
Tests: Use helper method for config change
Document MessageOfTheDay extension
Add UI element to display messages of the day
Add MessageOfTheDay-entries to ServerInfo
Change-Id: Iceb5facff6b832c33fd9c991bf92a48446c844e9