pgsql: Update to autoconf 2.59 as well as updates of related scripts

Log Message:
-----------
Update to autoconf 2.59 as well as updates of related scripts

Modified Files:
--------------
    pgsql:
        configure (r1.440 -> r1.441)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.diff?r1=1.440&r2=1.441)
        configure.in (r1.413 -> r1.414)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.in.diff?r1=1.413&r2=1.414)
    pgsql/config:
        config.guess (r1.5 -> r1.6)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/config/config.guess.diff?r1=1.5&r2=1.6)
        config.sub (r1.5 -> r1.6)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/config/config.sub.diff?r1=1.5&r2=1.6)
        install-sh (r1.2 -> r1.3)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/config/install-sh.diff?r1=1.2&r2=1.3)
        mkinstalldirs (r1.3 -> r1.4)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/config/mkinstalldirs.diff?r1=1.3&r2=1.4)
    pgsql/src/include:
        pg_config.h.in (r1.85 -> r1.86)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/pg_config.h.in.diff?r1=1.85&r2=1.86)