Merge pull request #3629 from pchote/superweapons

Fix superweapon timer / perf text conflict.
Allow map-placed frozen actors to start revealed.
Freeze civilian and map structures under fog. Fixes #3614.
Hide walls under fog.
Allow mods to set default lobby options.
Reset default state when a dedicated server clears.
Add lobby options for Shroud and Fog.
Tweak starting unit defaults.
Add RA starting units setup
Add trait interfaces for added/removed from world.
Rewrite bib to match new FrozenUnderFog capabilities.
Update changelog.
Merge pull request #3633 from pchote/frozen-polish

Clean up loose ends with fog and lobby options.
Merge pull request #3635 from pchote/changelog

Update changelog to current.
Restore Alt-f4 quit shortcut for Windows users.
Merge pull request #3637 from pchote/ripley-f7u12

Restore alt-f4 for windows users only.
fixed RA map: ATHENA

removed Actor656: tran.husk1 (was burning down).
Merge pull request #3638 from wuschel/bleed

fixed RA map: ATHENA
Adds muzzle flash to all vehicles and ships with cannons.

Muzzle animation is a customized version of the original gunfire.shp. Not using all frames for light tank, flak truck and flak cannon is intentional.
Apply GTWR fix to RA defenses (pillboxes, flame turret) as well.