procedure SendKeepAlive
Sends single keep alive packet to the icq server.

it is safe to send keepalive packets.

it is safe to never send keepalive packets.

keepalive packets are sent by official icq clients, when the checkbox "keep the connection alive" is turned on.

it is safe to send keepalive packets with an interval of 30 or more seconds between keepalive packets. It is unknown if they can be sent more frequently.