Ammo update, container equip weapon fix

Enabled "Transfer Ammo to gun" option for weapons of the same ammo type,
rather than just weapons of the same type.

Removed batteries from loot spawns, conflicting models with the 5.56
ammo tin confuses players, plus the item is useless.

Added Z position height boost for spawning outside the 6x6Km bounds (in
the ocean) to compensate for falling through server objects.

Fixed a bug with equipping weapons from containers that would result in
them converting to items until being dropped and picked up again.

Fixed a bug where moving a weapon between inventory and container would
result in it being equipped.

Fixed a bug where tent construction couldn't be stopped by releasing the
Interact (F) key.

Known bug: First time a defence item is constructed after server
initiation will fail and the item will remain there, any constructions
after this work fine however.