No memory leak here, just a very tiny thing I noticed.

Free SOC_s to a good home

See merge request !291

* Fix a memory leak regarding implementation of SOC_ (improperly copypasted code from LUA_LoadLump!!)
* Optimise the repeated strlen usage into a single call, which is stored for later.

Dr. Who And The Sleeping Weather

See merge request !288

SP savegame continues icon crash

See merge request !290

Makefile: Split zlib and libpng

See merge request !285

Fixer mixer: Mixer Memory Leaks

See merge request !287

Weather is already run client-side. What if we ran it render-side, for major performance gains? This commit will answer all your questions - and more!

A value of 1 in freesrc for Mix_LoadWAV_RW and Mix_LoadMus_RW calls SDL_RWclose on the RWops anyway.
For Mix_LoadWAV_RW the RWops is freed right after the data is loaded (because it makes a copy of the data in memory)
For Mix_LoadMUS_RW the RWops is freed when Mix_FreeMusic is called (because the data is not a copy)
So setting 1 on freesrc doesn't actually free the RWops immediately on Mix_LoadMus_RW *unless* it failed to load any music.

Mix_QuickLoad_RAW sets a flag in the Mix_Chunk so that Mix_FreeChunk doesn't actually Free the sound.
Checks for the flag when freeing, and if it's 0, we free the data manually after Mix_FreeChunk.
I went back to Z_Malloc and Z_Free for this because they still work after this.

Use MemAvailable instead

See merge request !281

Thanks again MonsterIestyn!

Colormap code cleanup

See merge request !275

R_CreateColormap2 and R_MakeColormaps have been made obsolete, it's just R_CreateColormap now, like it used to be!

With that, I moved R_CreateColormap2's exclusive software colormap malloc code to R_CreateColormap, and merged the two software-only blocks of code into one. I also disabled any unneeded variables and fixed a preprocessor-related goofup

Fix for HOM removal in non-green resolutions

See merge request !273

Yo Screen So Wide y Is Invalid

See merge request !271

v_video Killed The r_radio Star

See merge request !270

Zalloc Potter and the Death-Free Hallows

See merge request !269

Lighting fixes? Plane and simple!

See merge request !268

Introduce a temporary measure to enable the old stuff, minus one of the most obviously terrible bugbears of yesteryear. Let it be known that any downstream poirt will almost certainly toggle this ASAP.

Clean up a bunch of v_video.c functions that previously exhibited unfortunate side effects when run in non-green resolutions.

* V_DrawFixedPatch and ilk:
	* Change the offset of V_FLIP so it's not one screen-pixel off where its non-flipped sprite would have started being drawn from.
	* Write to x and y as well as desttop so that anti-screen-overflow checks later in the function behave properly with non-green resolutions.

* V_DrawFill:
	* Reduce number of operations performed upon `c`.

* V_DrawString and ilk:
	* Offset the left and right boundary checks in non-green resolutions such that you can actually draw stuff to the left of basevid screen x coordinate 0.