Add tls/ssl port for irc

Seems to be most commonly used, also relevant discussion
http://tools.ietf.org/html/draft-hartmann-default-port-for-irc-via-tls-ssl-09

Signed-off-by: Amadeusz Sławiński <amade@asmblr.net>
Allow irc_t to use tls/ssl port

Signed-off-by: Amadeusz Sławiński <amade@asmblr.net>