i don't know if anyone uses 6667 anymore, but adding it anyway
so the abbreviated one below w/" over SSL" does make more sense.
usually for me 6697 is the only port unrecognized by services(5)
in netstat output under Foreign Address, so this is for consistency,
and i believe these are official.
diff --git a/etc/services b/etc/services
index ceb2b58c17d..146876ce065 100644
@@ -262,6 +262,8 @@ postgresql 5432/tcp # PostgreSQL
postgresql 5432/udp # PostgreSQL
rfb 5900/tcp vnc # Remote Framebuffer
syslog-tls 6514/tcp # syslog over TLS
+irc 6667/tcp # Internet Relay Chat
+irc 6697/tcp # IRC over SSL
afs3-fileserver 7000/tcp # AFS fileserver
afs3-fileserver 7000/udp # AFS fileserver
afs3-callback 7001/tcp # AFS callback server