Make base lockout period based on sizes of base

Created by: odmonk

odmonkg suggests: "could it be possible to have the bases lock after turnover for different amounts: for example, small bases lock for only 3 hours, medium bases for 6 hours, huge bases for 12 hours, etc.? That would let the small bases be tugged back-and-forth waiting for larger ones to become unprotected, so Military/Rebel could keep more busy"