Request 24-bit depth buffer from SDL

See merge request STJr/SRB2!1635

Add carry type to fans (with fixed merge conflicts)

See merge request STJr/SRB2!1809

Fix __len metamethod ignored on tables

See merge request !1328

Clean up the WAD searching code a little.

See merge request !1678

readhuditem parse fixes

Closes #887

See merge request STJr/SRB2!1816

Fix action 457 (Track object angle) not triggering the 'failure' tag

Closes #883

See merge request STJr/SRB2!1814

Fix 'exclusive' flag on plane scrollers being inverted

Closes #885

See merge request STJr/SRB2!1813

Fix UDMF FOF flags

See merge request STJr/SRB2!1802

Fix readhuditem not parsing flags correctly
Fix unknown word warning erroneously describing the HUD item as a level header

Allow objects with MF2_LINKDRAW to use their own color

See merge request STJr/SRB2!1576

Use sound flags for sfxinfo, fix SF_TOTALLYSINGLE checks

See merge request STJr/SRB2!1765

Stop -Wuse-after-free warnings

See merge request !1805

Stop -Waddress warnings

See merge request !1804

Only set default skin/color when possible

See merge request STJr/SRB2!1772

Fix "unknown command" not being printed on dedicated

See merge request STJr/SRB2!1771

Fix map number checks when reading unlockable conditions

Closes #882

See merge request STJr/SRB2!1807

Add more menu graphics to the whitelist.

Closes #765

See merge request STJr/SRB2!1731

Fix size_t compiler warnings in P_WriteTextmap

See merge request STJr/SRB2!1785

Fix description of A_ParentTriesToSleep

See merge request STJr/SRB2!1784

Make autobrake account for scale

See merge request STJr/SRB2!1782

Fix semibright/fulldark frame flags not working with 3D models

See merge request STJr/SRB2!1779

Purge a bunch of legacy/unused stuff

See merge request STJr/SRB2!1801

Aren't used and definitely should not be in here anymore