Following a wild adventure yesterday tracking down
an insanity inducing bug in emacs-zmq which wound
up being related to the change to add a byte order
mark, here is a patch to add a NEWS entry so that
others will be warned that the change has happened.
Tom

PS is it a bug that "\uFEFF" reads as a symbol instead
of whitespace in utf-8-unix encoding?

Relevant links.
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=60750
https://github.com/nnicandro/emacs-zmq/pull/43
https://github.com/search?p=3&q=utf-8-auto+-async.el&type=Code
https://github.com/search?q=utf-8-auto&type=Code