Adding and Removing Clients to/from Groups
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To add a client into a server or channel group you need a
i_group_member_add_power value that is greater or equal than the
i_group_needed_member_add_power of the specific group. Analogously you will
need a i_group_member_remove_power that is greater or equal to the
i_group_needed_member_remove_power of the specific group.
Additionally for either removing or adding a client from or into a group your
i_client_permission_modify_power must be greater or equal to the clients
i_client_needed_permission_modify power.