pgsql: Kerberos fixes from Magnus Hagander --- in theory Kerberos 5 auth

Log Message:
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Kerberos fixes from Magnus Hagander --- in theory Kerberos 5 auth
should work on Windows now.  Also, rename set_noblock to pg_set_noblock;
since it is included in libpq, the former name polluted application
namespace.

Tags:
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REL8_0_STABLE

Modified Files:
--------------
    pgsql:
        configure (r1.424.4.1 -> r1.424.4.2)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.diff?r1=1.424.4.1&r2=1.424.4.2)
        configure.in (r1.398.4.1 -> r1.398.4.2)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.in.diff?r1=1.398.4.1&r2=1.398.4.2)
    pgsql/src/backend/postmaster:
        pgstat.c (r1.87 -> r1.87.4.1)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/postmaster/pgstat.c.diff?r1=1.87&r2=1.87.4.1)
        postmaster.c (r1.443.4.1 -> r1.443.4.2)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/postmaster/postmaster.c.diff?r1=1.443.4.1&r2=1.443.4.2)
    pgsql/src/include:
        port.h (r1.69.4.1 -> r1.69.4.2)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/port.h.diff?r1=1.69.4.1&r2=1.69.4.2)
    pgsql/src/interfaces/libpq:
        Makefile (r1.126.4.2 -> r1.126.4.3)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/Makefile.diff?r1=1.126.4.2&r2=1.126.4.3)
        fe-auth.c (r1.99 -> r1.99.4.1)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/fe-auth.c.diff?r1=1.99&r2=1.99.4.1)
        fe-connect.c (r1.301.4.1 -> r1.301.4.2)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/fe-connect.c.diff?r1=1.301.4.1&r2=1.301.4.2)
    pgsql/src/port:
        noblock.c (r1.5 -> r1.5.4.1)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/port/noblock.c.diff?r1=1.5&r2=1.5.4.1)