[Xymon] old hosts.cfg tag "login"

[Jeremy Laidman]

Big Brother used to match service names in BBNETSVCS (defined in
bbdef-server.sh), and lookup the port number in /etc/services, and try
to connect with bbnet to the TCP port.  The "login" service is more
commonly called rlogin and operates on TCP port 513.  Nobody uses it
anymore.  If you have an old bbdef-server.sh and if BBNETSVCS includes
"login" then this is likely to be it.

If the servers are still using rlogin, and you can't have it turned
off, and you still need to test for it, you can emulate the same test
by adding an entry to protocols.cfg.