We don't suport many/multi case any more.
It was also part of the pool support path,
but that went away when I cleaned up the DNS lookup.

The old code had a complicated table to handle the
case where a peer slot wasn't setup yet.  That handled
responses to pool requests (from dns), peer requests,
and multicast.  All those complications are gone now.

-bash-4.4$ ./test-all/main/ntpclients/ntpmon
ntpmon: can't find Python curses library.
No module named _curses
-bash-4.4$