disallow bots on poland raid
disallow bots on burlesca
Merge pull request #6215 from Mailaender/poland-raid-bots

Disabled bots on maps with separate land masses between destructible bridges
Fixed UpgradeRules for #6030.
Fixed Warhead ValidTargets and InvalidTargets.
#6030 regression fix. Added EffectivenessAgainst <= 0 check to IsvalidAgainst for Warhead.
Adds Diplomacy keywords for ValidTarget checks.

Changes:

Allows diplomacy stance checks to be done on warheads and weapons, using keywords in ValidTargets and InvalidTargets.
Additional changes: Changed Weapon.Impact to use Target instead of WPos.
Split out some common functionality to DamageWarhead from its derivatives.
Ioncannon changed to AbsoluteSpreadDamage.
Detonating Madtank now affects other Madtanks, but still not itself.
Changed LaserZap projectiles to AbsoluteSpreadDamage.