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	talkd fixes in ubuntu 20.04
	October 11th, 2020
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	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!