webperimental: Add patch #5293 and use it to change webperimental.

Changes in webperimental:
 * spies can steal from non capitals as well as capitals.
 * max 5% of a player's gold may be stolen from a regular city and from the
   capital of a nation in Anarchy.
 * max 30% of a player's gold can be stolen from the capital city under
   governments other than Anarchy and Communism.
 * max 50% of a player's gold can be stolen from the capital city under
   Communism.