wikiheaders: Automatically categorize API symbols by subsystem.

.wikiheaders-options

@@ -17,3 +17,8 @@ warn_about_missing = 0
 wikipreamble = (This is the legacy documentation for stable SDL2, the current stable version; [SDL3](https://wiki.libsdl.org/SDL3/) is the current development version.)
 wikiheaderfiletext = Defined in [%fname%](https://github.com/libsdl-org/SDL/blob/SDL2/include/%fname%)
 manpageheaderfiletext = Defined in %fname%
+
+# All SDL_config_*.h headers are uncategorized, in case something slips in from them.
+# All SDL_test_* headers become "Test" categories, 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/Test/; s/\ASDL_?(.*?)\.h\Z/$1/; ucfirst();