All paths moved to path.h.

Cleanup in curses.h: removed reg definition.
All include files reformatted for 4-space indent.

include/stdarg.h

@@ -8,7 +8,7 @@
  * Define va_start, va_arg, va_end, va_copy.
  */
 #if defined(__GNUC__)           /* Gnu C */
-# define va_start(ap, last)	__builtin_va_start((ap), last)
+# define va_start(ap, last)     __builtin_va_start((ap), last)
 # define va_arg(ap, type)       __builtin_va_arg((ap), type)
 # define va_end(ap)             __builtin_va_end((ap))
 # define va_copy(dest, src)     __builtin_va_copy((dest), (src))