Usage: servergroupdel sgid={groupID} force={1|0}

Deletes the server group specified with sgid. If force is set to 1, the server 
group will be deleted even if there are clients within.

Example:
   servergroupdel sgid=13
   error id=0 msg=ok
   
   servergroupdel sgid=14 force=1
   error id=0 msg=ok