As usual, the release notes for older branches will be made by cutting
these down, but put them up for community review first.

Due to the out-of-cycle release of 14.4, there are a number of commits
that appeared in 14.4 that are not yet shipped in the earlier branches.
This draft repeats those release note entries for convenience in
preparing the older-branch notes later.  They'll be stripped out of
the 14.5 section after that's done.