Remove mod argument from GenerateMinimap.

It is redundant now that we enforce v6 maps.
Fix bitrotted command descriptions.
Merge pull request #4295 from pchote/utility-fix

Fix bitrotted utility description.
Always initialise the fog palette. Fixes #4297.
Merge pull request #4299 from pchote/shroud-fix

Always initialise the fog palette.
Add sight to helicopter husks. Fixes #4298.
Only render the frozen actors that are visible. Fixes #4300.
Remove ContrailFader when complete. Fixes #4302.
fix broken FreeType 2 RPM dependency

* http://pkgs.org/download/freetype on Fedora
* http://pkgs.org/download/freetype2 on everything else
Merge pull request #4303 from pchote/batch-fix

Fix two serious perf regressions.
Merge pull request #4301 from pchote/cnc-helicopter-husk-sight

Add sight to helicopter husks.
reveal shroud for aircraft husks falling down
Merge pull request #4305 from Mailaender/rpm-freetype

Fixed broken FreeType 2 RPM dependency on Fedora
update CHANGELOG
Merge pull request #4306 from Mailaender/ra-aircraft-husk-sight

Reveal shroud for RA aircraft husks
Change crate graphics for christmas. Closes #4296.
Merge pull request #4313 from pchote/gifts

Change crate graphics for christmas.
Add a lua actor facing helper.
Fix initial HTNK turret facing in C&C shellmap.
Merge pull request #4315 from pchote/cnc-shellmap-fix

C&C shellmap polish fix.