I've three patches relative to mutt 1.5.21 at:
<
http://people.spodhuis.org/phil.pennock/software/mutt-patches/>
I believe that the "TLS v1.1 and v1.2" functionality is now in mutt.
"TLS ServerNameIndication" support would be handy. I know that my
SMTP mail-server is capable of handing out different certs for different
hostnames and Submission is where that makes the most sense.
The "Gmail custom search IMAP extension" functionality works, but has
some rough edges; I'd forgotten most of the mutt internals and didn't
come back up to speed for writing that patch. It works well enough for
me, that I can use =/ to do a server-side search using the Gmail query
syntax.
There have been posts from me (<various>(a)spodhuis.org) to the mutt-dev
list with more details on each patch, if you're curious.
Regards,
-Phil