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.

Tags:
----
REL8_1_STABLE

Modified Files:
--------------
    pgsql:
        configure (r1.461 -> r1.461.2.1)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.diff?r1=1.461&r2=1.461.2.1)
        configure.in (r1.431 -> r1.431.2.1)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.in.diff?r1=1.431&r2=1.431.2.1)
    pgsql/src/include:
        c.h (r1.190 -> r1.190.2.1)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/c.h.diff?r1=1.190&r2=1.190.2.1)
        pg_config.h.in (r1.87 -> r1.87.2.1)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/pg_config.h.in.diff?r1=1.87&r2=1.87.2.1)
        pg_config.h.win32 (r1.22 -> r1.22.2.1)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/pg_config.h.win32.diff?r1=1.22&r2=1.22.2.1)
        port.h (r1.84 -> r1.84.2.1)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/port.h.diff?r1=1.84&r2=1.84.2.1)
    pgsql/src/interfaces/ecpg/ecpglib:
        Makefile (r1.33 -> r1.33.2.1)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/ecpglib/Makefile.diff?r1=1.33&r2=1.33.2.1)
    pgsql/src/interfaces/libpq:
        win32.h (r1.27 -> r1.27.6.1)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/win32.h.diff?r1=1.27&r2=1.27.6.1)