pgsql: This patch adds native LDAP auth, for those platforms that don't

Log Message:
-----------
This patch adds native LDAP auth, for those platforms that don't have
PAM (such as Win32, but also unixen without PAM). On Unix, uses
OpenLDAP. On win32, uses the builin WinLDAP library.

Magnus Hagander

Modified Files:
--------------
    pgsql:
        configure (r1.484 -> r1.485)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.diff?r1=1.484&r2=1.485)
        configure.in (r1.454 -> r1.455)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.in.diff?r1=1.454&r2=1.455)
    pgsql/src/backend/libpq:
        auth.c (r1.134 -> r1.135)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/libpq/auth.c.diff?r1=1.134&r2=1.135)
        hba.c (r1.150 -> r1.151)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/libpq/hba.c.diff?r1=1.150&r2=1.151)
        pg_hba.conf.sample (r1.60 -> r1.61)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/libpq/pg_hba.conf.sample.diff?r1=1.60&r2=1.61)
    pgsql/src/include:
        pg_config.h.in (r1.94 -> r1.95)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/pg_config.h.in.diff?r1=1.94&r2=1.95)
    pgsql/src/include/libpq:
        hba.h (r1.41 -> r1.42)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/libpq/hba.h.diff?r1=1.41&r2=1.42)