Update to Freeciv server r35686.
Update to Freeciv server r35686.

Freeciv commit message:
webperimental: spy nuke escape is for veterans.

Only let agents and spymasters try to escape after hiding a nuke in a spy
city nuking.

See hrm Feature #661962

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