Merge changelog.
Revert "[mms] Add configuration to allow for SMTP authentication if the current Horde access does not have an authenticated user."

This reverts commit 48b100c698a86791736c2f13c533236d72322d58.
Prepare hotfix release.

I accidentally released from FRAMEWORK_5_2. It's overdue to split repos.
[jan] Fix bothed 2.12.0 release.