I'm at the win32 error messages once more. The DLL load thingy doesn't

I'm at the win32 error messages once more. The DLL load thingy doesn't
work on all win9x machines, so i made it go thru a l ookup table
instead, using the DLL as last resort.  I also moved this out of the
fe-misc.c file because of the size of the lookup ta ble. Who knows, we
might add more other win32 specific code there in the future.

I also fixed a small typo in the pg_config.h.win32 that made the
compiler compla in about the gnu snprintf declaration.

I tried to make this patch with psql coding style. I've successfully
tested this on win2k and win98 and it works fine (i.e. the mes sage
shows on win98 too, it didn't with the old implementation).

Magnus Naeslund