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

Log Message:
-----------
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.

Modified Files:
--------------
    pgsql/src/include:
        pg_config.h.win32 (r1.56 -> r1.57)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/pg_config.h.win32?r1=1.56&r2=1.57)