[Freeciv-Dev] [Patch] Reduce superfluous tile_info packets version 2

[Raimar Falke <hawk@xxxxxxxxxxxxxxxxxxxxxxx>]

Ok here the cleaned up patch for official submission. This patch does:
 - removes the sent field of struct tile (AFAI see this was intended
 to solve a similar problem and it now obsolete)
 - adds a new server-only bit vector in struct tile: changed
 - if the server tries to sent a tile_info packet it is checked if
 this tile has changed since last sent for this player
 - if ther server has sent a tile_info packet the corresponding bit in
 the changed field is cleared
 - settler.c changes the special field calculates some stuff and
 reverts these changes. Such changes aren't user/client visible and
 have from now on to be done with the base_* methods.

        Raimar

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 "On the eigth day, God started debugging"

change_field2.diff
Description: Text document