.wikiheaders-option: Filled in quickref metadata.

This is still disabled because SDL2's documentation can be spotty at times,
but it's better to have this stuff available in case we ever make some
documentation improvements.

.wikiheaders-options

@@ -22,3 +22,10 @@ manpageheaderfiletext = Defined in %fname%
 # All SDL_test_* headers become uncategorized, everything else just converts like SDL_audio.h -> Audio
 # A handful of others we fix up in the header itself with /* WIKI CATEGORY: x */ comments.
 headercategoryeval = s/\ASDL_config_.*?\.h\Z//; s/\ASDL_test_.*?\.h\Z//; s/\ASDL_?(.*?)\.h\Z/$1/; ucfirst();
+
+quickrefenabled = 0  # !!! FIXME: maybe later, but there are probably documentation gaps to fix first.
+quickrefcategoryorder = Init,Hints,Error,Version,Properties,Log,Video,Events,Keyboard,Mouse,Touch,Gesture,GameController,Joystick,Haptic,Audio,Timer,Render,LoadSO,Thread,Mutex,Atomic,Filesystem,RWOPS,Pixels,Surface,Blendmode,Rect,Clipboard,Messagebox,Vulkan,Metal,Platform,Power,Sensor,Bits,Endian,Assert,CPUInfo,Locale,System,Misc,GUID,Main,Stdinc
+quickreftitle = SDL2 API Quick Reference
+quickrefurl = https://libsdl.org/
+quickrefdesc = The latest version of this document can be found at https://wiki.libsdl.org/SDL2/QuickReference
+quickrefmacroregex = \A(SDL_Atomic...Ref|SDL_assert.*?|SDL_arraysize|SDL_Swap[BL]E\d\d|SDL_[a-z]+_cast|SDL_Load...)\Z