Update to Freeciv server r35454.
Update to Freeciv server r35454.

Freeciv commit message:
Do not access out-of-bounds index A_FUTURE from global_advances[]

Reported by Per M

See hrm Bug #658073

andreasrosdal/freeciv-web,andreasrosdal/freeciv-web,andreasrosdal/freeciv-web,andreasrosdal/freeciv-web,andreasrosdal/freeciv-web