old Asterisk version

[John Nemeth <jnemeth%cue.bc.ca@localhost>]

     We currently have five versions of Asterisk in pkgsrc.  The
versions are Asterisk 11.* (in comms/asterisk) and Asterisk 13.*
to Asterisk 16.*.  This is getting a little silly and it is time
to clean out some of them.  Asterisk 11.* went EOL two years ago
on Oct. 25th, 2017.  Asterisk 13.* is good until 2021.  Asterisk
14 went EOL a year on Sept. 26th, 2018.  Asterisk 15 will go eol
next month on Oct. 3rd, 2019.  Asterisk 16.* is good until 2023.
Asterisk 17.* is due to be released next month.

     It is my intention to delete Asterisk 11.* and Asterisk 14.*
in the very near futue (possibly before the freeze).  If you really
want one of these for some reason, speak up now or forever hold
your peace.  Asterisk 15.* can stay for a bit.

     I would like to come up with some kind of plan, such as an
Asterisk version may be deleted any time after it has been eol for
a year.