Usage: channeldelperm cid=123 permid={permID}|permsid={permName}...

Removes a set of specified permissions from a channel. Multiple permissions 
can be removed at once. A permission can be specified by permid or permsid.

Example:
   channeldelperm cid=16 permsid=i_icon_id|permsid=i_client_needed_talk_power
   error id=0 msg=ok
