Usage: servergroupdelperm sgid={groupID} permid={permID}|permsid={permName}...

Removes a set of specified permissions from the server group specified with 
sgid. Multiple permissions can be removed at once. A permission can be 
specified by permid or permsid.

Examples:
   servergroupdelperm sgid=16 permid=i_channel_join_power|permid=i_client_talk_power
   error id=0 msg=ok