should break on Unix/X11.

Win32 merge and general portability stuff:

* acconfig.h,configure.in: Check for <sys/time.h>.

* gdk/win32: New directory (actually, been there for a while).

* gtk/fnmatch.c: Include <glib.h> for G_DIR_SEPARATOR, WIN32 and
NATIVE_WIN32, and use these. Always case fold on Win32. No
backslashed escapes on native Win32.

* gtk/{gtk.def,makefile.msc}: New files.

* gtk/Makefile.am: Add above new files.

* gtk/{gtkaccelgroup,gtkbindings}.c: Include <string.h>
instead of <strings.h>.

* gtk/{gtkcalendar,gtkitemfactory,gtkpreview,gtkrc}.c: Include
config.h. Protect inclusion of <sys/param.h>, <sys/time.h>, and
<unistd.h> appropriately.

* gtk/gtkdnd.c: Merge in Win32 version (which doesn't do much).
Use ABS() (from <glib.h>) instead of abs().

* gtk/gtkfilesel.c: Moved Win32-specific includes after inclusion
of gtk (and thus glib) headers, so that WIN32 will be
defined. With MS C, include <direct.h> for mkdir proto...