Mailx 8.1.1 with fixes from D Bit:

This came from the Slackware 4.0 sources.  I unpacked the stuff by hand since
I don't (knowingly) have whatever package manager it expects, and the resulting
source compiled with a bazillion warnings due to a bad definition of sig_t (in
the CFLAGS in the Makefile) and lots of confusion between NULL and 0 (mainly
the msgvec variable and friends).  No idea how the code got so confused...

While I was in there I fixed "Reply" (which calls the _Respond() routine)
to use the Reply-To: address if it exists, since the usual behavior is
non-RFC-compliant and I've been yelled at about that before, by people who
justifiably expected their Reply-To: address to be honored.  Previously only
"r" honored this address, but I don't understand the thinking there, you
should reply to the address that the sender wants you to regardless of
whether you're responding to the rest of the To/Cc/Bcc lists too.

Also I added a "~H" tilde escape which allows specifying user-defined lines
which will be included with the message headers.  Handy for using SmartList,
or fixing a correct "From:" line if your default hostname isn't the one
that people know you by.  Well OK it's a problem I have often and I'm
sick of telneting to port 25 by hand to get around it!

Annoying bug finally fixed:  for ages typing INT has caused Mail to
imagine that the user has re-typed the previous line from before the INT.
This appears to be due to fgets() not saving the updated buffer pointer, so
I put an *extremely* non-portable fix into collint() to flush buffered input.

John Wilson <wilson@dbit.com> (JMBW), July 10, 1999.