I had always wondered why pg_config.h.win32 claimed that Windows

provides optreset.  Current mastodon results prove that in fact it
does not; it was only because getopt.c defined the variable anyway
that things failed to fall over.

src/include/pg_config.h.win32

@@ -178,9 +178,6 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #define HAVE_INTTYPES_H 1
 
-/* Define to 1 if you have the global variable 'int optreset'. */
-#define HAVE_INT_OPTRESET 1
-
 /* Define to 1 if you have the global variable 'int timezone'. */
 #define HAVE_INT_TIMEZONE