wikiheaders: Updated to latest, cleaned up category documentation a little.

This documentation needs a LOT of work--maybe someday--but it's definitely not
_broken_ right now, which is good enough for now.

include/SDL_cpuinfo.h

@@ -19,10 +19,16 @@
   3. This notice may not be removed or altered from any source distribution.
 */
 
+/* WIKI CATEGORY: CPUInfo */
+
 /**
- *  \file SDL_cpuinfo.h
+ * # CategoryCPUInfo
  *
- *  CPU feature detection for SDL.
+ * CPU feature detection for SDL.
+ *
+ * These functions are largely concerned with reporting if the system has
+ * access to various SIMD instruction sets, but also has other important info
+ * to share, such as number of logical CPU cores.
  */
 
 #ifndef SDL_cpuinfo_h_
@@ -30,8 +36,6 @@
 
 #include "SDL_stdinc.h"
 
-/* WIKI CATEGORY: CPUInfo */
-
 /* Need to do this here because intrin.h has C++ code in it */
 /* Visual Studio 2005 has a bug where intrin.h conflicts with winnt.h */
 #if defined(_MSC_VER) && (_MSC_VER >= 1500) && (defined(_M_IX86) || defined(_M_X64))