Fix to work with mods that have faction side as a string instead of a number

Fixed bug where the destroy cache wasn't spawning.
Fixed bug in code that can cache enemy if needed.

. Feature: Destroy objective no longer exactly on marker
. Fix: 2 players needed more enemy
. Fix: Block arsenal loading (via 'load' button) of items not available in the arsenal
. Fix: Don't allow 'destroy' objective to be killed with a C4
. Fix: Death cam could follow flyby plane when players were alive
. Fix: heli flyby were deleted when objective captured even if they were overhead

. Added civilians
. Added flybys
. Added squad mate radio chatter volume adjustable
. On enter/exit arsenal - don't save loadout unless changes made

New features:
* New maps: Chernarus2020, Kujari
* Can now change AI teammates loadout

Factions Update: now allows choosing the player and enemy factions. Can choose multiple factions (with shift/ctrl) and each game will choose randomly amoung them.

* Added factions
* Vitual arsenal now has full/map specific/faction specific options. Map specific will limit to the DLCs items that came with the map where faction specific will limit to only allow gear that the given faction uses.
* New location routine which finds more places on the map. There is an option to try to only find spots in town/cities, or let it search anywhere.
* Can turn on/off night vision view when in death follow camera
* Now players are invulnerable for 10 seconds after spawning to deal with AI who are spawn camping
* Fix boats not always map specific
* Fix boats showng up in rice patties in SOG Prairie Fire maps

Hotfix: full arsenal option was broken

* make HOLD failure switch back to CAPTURE instead of failing mission
* DESTROY duration lengthened and scales with parameter for capture duration
* on entering the arsenal for the first time, camera will be over right shoulder
* slightly more smoke used by ai
* more bad weather