[Freeciv-Dev] one last addition to my fog of war post

[Thue Janus Kristensen <thue105@xxxxxxxxxxxxxxxxxx>]

If you find the client slow it is because of the airbases it draws to keep
track of fog of war - each one removed or added causes 9 redraws. I checked
that the handle_tile_info function in client/packhand drew the minimum number
of tiles.

Also, the airbases are not a valid indicator if the units of 2 players are in
an area. Someone please help me put the fog of war graphics in - I have no idea
how it is done, but it should be easy for the enlightened.

-Thue