+ C [{[+|-]<pubkeyfile> }] (*)
+ Set/unset channel public key mode, and add/remove
+ channel publics key from the channel public key
+ list. When this mode is set only those users
+ whose public keys has been added to the list are
+ able to join the channel. Channel founder may set
+ this mode and operate on the channel public key
+ list.
+
+ To add public key to the list give command:
+ CMODE +C +/path/to/the/public_key_file.pub
+
+ To remove one public key from the list give
+ command:
+ CMODE +C -/path/to/the/public_key_file.pub
+
+ To add or remove more than one public keys add as
+ many public key file paths as necessary.
+
+ When this mode is unset (-C), all public keys are
+ removed from the list. If +C is given without
+ arguments the current channel public key list is
+ displayed.