Usage: servergroupaddclient sgid={groupID} cldbid={clientDBID}

Permissions:
  i_group_member_add_power
  i_group_needed_member_add_power

Description:
  Adds a client to the server group specified with sgid. Please note that a
  client cannot be added to default groups or template groups.

Example:
  servergroupaddclient sgid=16 cldbid=3
  error id=0 msg=ok
