pgsql: Add a -w/--no-password option that prevents all password prompts

Log Message:
-----------
Add a -w/--no-password option that prevents all password prompts to all
programs that have a -W/--password option.

In passing, remove the ancient PSQL_ALWAYS_GET_PASSWORDS compile option.

Modified Files:
--------------
    pgsql/contrib/vacuumlo:
        vacuumlo.c (r1.39 -> r1.40)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/vacuumlo/vacuumlo.c?r1=1.39&r2=1.40)
    pgsql/doc/src/sgml:
        vacuumlo.sgml (r1.3 -> r1.4)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/vacuumlo.sgml?r1=1.3&r2=1.4)
    pgsql/doc/src/sgml/ref:
        clusterdb.sgml (r1.24 -> r1.25)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/clusterdb.sgml?r1=1.24&r2=1.25)
        createdb.sgml (r1.48 -> r1.49)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/createdb.sgml?r1=1.48&r2=1.49)
        createlang.sgml (r1.42 -> r1.43)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/createlang.sgml?r1=1.42&r2=1.43)
        createuser.sgml (r1.51 -> r1.52)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/createuser.sgml?r1=1.51&r2=1.52)
        dropdb.sgml (r1.34 -> r1.35)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/dropdb.sgml?r1=1.34&r2=1.35)
        droplang.sgml (r1.31 -> r1.32)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/droplang.sgml?r1=1.31&r2=1.32)
        dropuser.sgml (r1.39 -> r1.40)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/dropuser.sgml?r1=1.39&r2=1.40)
        pg_dump.sgml (r1.110 -> r1.111)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/pg_dump.sgml?r1=1.110&r2=1.111)
        pg_dumpall.sgml (r1.76 -> r1.77)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/pg_dumpall.sgml?r1=1.76&r2=1.77)
        pg_restore.sgml (r1.79 -> r1.80)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/pg_restore.sgml?r1=1.79&r2=1.80)
        psql-ref.sgml (r1.219 -> r1.220)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/psql-ref.sgml?r1=1.219&r2=1.220)
        reindexdb.sgml (r1.7 -> r1.8)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/reindexdb.sgml?r1=1.7&r2=1.8)
        vacuumdb.sgml (r1.43 -> r1.44)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/vacuumdb.sgml?r1=1.43&r2=1.44)
    pgsql/src/bin/pg_dump:
        pg_backup.h (r1.49 -> r1.50)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_backup.h?r1=1.49&r2=1.50)
        pg_backup_archiver.c (r1.163 -> r1.164)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_backup_archiver.c?r1=1.163&r2=1.164)
        pg_backup_archiver.h (r1.77 -> r1.78)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_backup_archiver.h?r1=1.77&r2=1.78)
        pg_backup_db.c (r1.82 -> r1.83)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_backup_db.c?r1=1.82&r2=1.83)
        pg_dump.c (r1.526 -> r1.527)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_dump.c?r1=1.526&r2=1.527)
        pg_dumpall.c (r1.117 -> r1.118)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_dumpall.c?r1=1.117&r2=1.118)
        pg_restore.c (r1.93 -> r1.94)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_restore.c?r1=1.93&r2=1.94)
    pgsql/src/bin/psql:
        command.c (r1.202 -> r1.203)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/command.c?r1=1.202&r2=1.203)
        help.c (r1.139 -> r1.140)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/help.c?r1=1.139&r2=1.140)
        settings.h (r1.34 -> r1.35)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/settings.h?r1=1.34&r2=1.35)
        startup.c (r1.154 -> r1.155)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/startup.c?r1=1.154&r2=1.155)
    pgsql/src/bin/scripts:
        clusterdb.c (r1.24 -> r1.25)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/scripts/clusterdb.c?r1=1.24&r2=1.25)
        common.c (r1.34 -> r1.35)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/scripts/common.c?r1=1.34&r2=1.35)
        common.h (r1.21 -> r1.22)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/scripts/common.h?r1=1.21&r2=1.22)
        createdb.c (r1.31 -> r1.32)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/scripts/createdb.c?r1=1.31&r2=1.32)
        createlang.c (r1.33 -> r1.34)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/scripts/createlang.c?r1=1.33&r2=1.34)
        createuser.c (r1.41 -> r1.42)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/scripts/createuser.c?r1=1.41&r2=1.42)
        dropdb.c (r1.25 -> r1.26)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/scripts/dropdb.c?r1=1.25&r2=1.26)
        droplang.c (r1.30 -> r1.31)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/scripts/droplang.c?r1=1.30&r2=1.31)
        dropuser.c (r1.26 -> r1.27)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/scripts/dropuser.c?r1=1.26&r2=1.27)
        reindexdb.c (r1.16 -> r1.17)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/scripts/reindexdb.c?r1=1.16&r2=1.17)
        vacuumdb.c (r1.24 -> r1.25)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/scripts/vacuumdb.c?r1=1.24&r2=1.25)
    pgsql/src/include:
        pg_config_manual.h (r1.37 -> r1.38)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/pg_config_manual.h?r1=1.37&r2=1.38)