+- o: IRC operators are allowed to change channel- and channel-user-modes
+ even if they aren't channel-operator of the affected channel.
+
+- C: The server supports the CHANINFO command.
+
+
+II.2 Exchange channel-modes, topics, and persistent channels
+
+ Command: CHANINFO
+ Parameters: <channel> +<modes> <key> <maxusers> [<topic>]
+ Used by: servers only
+
+CHANINFO is used by servers to inform each other about a channel: its
+modes, channel key, user limits and its topic. <topic> is optional.
+
+If the channel already exists on the server receiving the CHANINFO command,
+it only adopts the <modes> (or the <topic>) if there are no modes (or topic)
+already set. It there are already values set the server ignores the
+corresponding parameter.
+
+If the channel doesn't exists at all it will be created.
+
+The parameter <key> must be ignored if a channel has no key (the parameter
+<modes> doesn't list the "k" channel mode). In this case <key> should
+contain "*" because the parameter <key> is required by the CHANINFO syntax
+and therefore can't be omitted. The parameter <limit> must be ignored when
+a channel has no user limit (the parameter <modes> doesn't list the "l"
+channel mode). In this case <limit> should be "0".