Via @creslin287 on the dev mailing list.
Hey All,
Just a quick reminder to all of you. As of today, the Asterisk 15
branch transitions into security fix only mode. What this means is
that that 15 branch will stop receiving normal bug-fixes/contributions
and only receive security patches. For those of you that are on this
release, it’s a good time to start planning and evaluating a path
forward to the up-and-coming Asterisk 16.0.0 release.
If you have any questions about the schedule for these types of events
and when this may happen to any other branches/versions, you can read
more about it on the wiki at
https://wiki.asterisk.org/wiki/display/AST/Asterisk+Versions
Best wishes to you all, and hope to see many of you at Astricon 