Allow packet numbers over 8 bit value, up to 16 bit value.
Allow packet numbers over 8 bit value, up to 16 bit value.

tltneon/freeciv-web,andreasrosdal/freeciv-web,andreasrosdal/freeciv-web,adaxi/freeciv-web,sylvain121/freeciv-web-server,tltneon/freeciv-web,sylvain121/freeciv-web-server,adaxi/freeciv-web,tltneon/freeciv-web,adaxi/freeciv-web,tltneon/freeciv-web,tltneon/freeciv-web,andreasrosdal/freeciv-web,adaxi/freeciv-web,adaxi/freeciv-web,sylvain121/freeciv-web-server,tltneon/freeciv-web,andreasrosdal/freeciv-web,andreasrosdal/freeciv-web