ngircd: add GLINE support

Also add IRCd notes regarding AllowRemoteOper and modeless channels.

README.md

@@ -114,6 +114,8 @@ Support for these IRCds exist, but are not tested as frequently and thoroughly.
     - Host changing is not supported.
 * [juno-ircd](https://github.com/cooper/yiria) (11.x / janet) - module `ts6` (see [configuration example](https://github.com/cooper/juno/blob/master/doc/ts6.md#pylink))
 * [ngIRCd](https://ngircd.barton.de/) (24+) - module `ngircd`
+    - For GLINEs to propagate, the `AllowRemoteOper` option must be enabled in ngIRCd.
+    - `+` (modeless) channels are not supported, and should be disabled for PyLink to function correctly.
 * [snircd](https://development.quakenet.org/) (1.3.x+) - module `p10`
     - Outbound host changing (i.e. for the `changehost` plugin) is not supported on P10 variants other than Nefarious.
 

protocols/ngircd.py

@@ -256,6 +256,14 @@ class NgIRCdProtocol(IRCS2SProtocol):
             log.debug("(%s) sjoin: bursting modes %r for channel %r now", self.name, modes, channel)
             self.mode(server, channel, modes)
 
+    def set_server_ban(self, source, duration, user='*', host='*', reason='User banned'):
+        """
+        Sets a server ban.
+        """
+        # <- :GL GLINE *!*@bad.user 3d :test
+        assert not (user == host == '*'), "Refusing to set ridiculous ban on *@*"
+        self._send_with_prefix(source, 'GLINE *!%s@%s %s :%s' % (user, host, duration, reason))
+
     def update_client(self, target, field, text):
         """Updates the ident, host, or realname of any connected client."""
         field = field.upper()