pgsql: Make Win32 build use our port/snprintf.c routines, instead of

Log Message:
-----------
Make Win32 build use our port/snprintf.c routines, instead of depending
on libintl which may or may not provide what we need.  Make a few marginal
cleanups to ensure this works.  Andrew Dunstan and Tom Lane.

Modified Files:
--------------
    pgsql:
        configure (r1.463 -> r1.464)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.diff?r1=1.463&r2=1.464)
        configure.in (r1.433 -> r1.434)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.in.diff?r1=1.433&r2=1.434)
    pgsql/src/include:
        c.h (r1.191 -> r1.192)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/c.h.diff?r1=1.191&r2=1.192)
        pg_config.h.in (r1.87 -> r1.88)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/pg_config.h.in.diff?r1=1.87&r2=1.88)
        pg_config.h.win32 (r1.23 -> r1.24)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/pg_config.h.win32.diff?r1=1.23&r2=1.24)
        port.h (r1.84 -> r1.85)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/port.h.diff?r1=1.84&r2=1.85)
    pgsql/src/interfaces/ecpg/ecpglib:
        Makefile (r1.34 -> r1.35)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/ecpglib/Makefile.diff?r1=1.34&r2=1.35)
    pgsql/src/interfaces/libpq:
        win32.h (r1.27 -> r1.28)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/win32.h.diff?r1=1.27&r2=1.28)