----------------------------------------
       talkd fixes in ubuntu 20.04
       October 11th, 2020
       ----------------------------------------
       
       When cosmic voyage updated to ubuntu 20.04 subtle things broke
       that I didn't notice right away. One of these was talk(1). We were
       using ytalk(1) as the program of choice back in 18.10, but that
       seems to no longer be in apt. I reinstalled it from source and was
       hopeful that it would do the trick. Not so much.
       
       I fought this for an hour tonight with a very patient voyager
       helping me out. I tried closing out of mosh and tmux to narrow
       down the issue. Eventually I got a clue from the error message in
       syslog.
       
       talkd[411722]: 127.0.0.1 (127.0.0.1): unintelligible packet
       
       I had a lot of these messages and they eventually got me to
       a redhat bug report that suggested removing the inetd entry for
       talkd would fix it. I commented that out and left the ntalkd line
       in place.
       
       I also fixed a thing that bugged me from back in the day. The
       nobody user had been configured to be a part of the tty group and
       I was using it in that inetd line. That felt dirty since nobody
       shouldn't have access to anything.
       
         sudo useradd -c 'in.talkd User' \
         -d /nonexistent \ -s /usr/sbin/nologin \
         -r -g tty talk
       
       So I added a 'talk' user, gave it the proper access, and swapped
       inetd to use that instead. Then I gave it a kick (restart the
       process) and things are working again. Whew!