Nation

 Fixes

- **Fixed claim protection checking the wrong chunk.** Protection was based on the
  player's position instead of the block being broken/placed. Players standing just
  outside a claim border could grief blocks inside the claim (and actions near the
  border were sometimes wrongly blocked). Protection and the war-bypass now check
  the actual block's chunk.
- **Fixed scheduled wars being cancellable by the defender.** The server still
  accepted a leftover "decline war" packet, so a modified client could unilaterally
  cancel any war declared against it. Scheduled wars can no longer be declined.
- **Fixed old wars never ending automatically.** Wars carried over from older
  versions of the mod had no start/activity timestamps, so the new auto-end rules
  (max duration & inactivity white peace) silently skipped them. They are now
  stamped on load and will end automatically like any other war.