pgsql: Equip the programs installed by contrib with proper --help and

Log Message:
-----------
Equip the programs installed by contrib with proper --help and --version
options and normally formatted help output.

Modified Files:
--------------
    pgsql/contrib/oid2name:
        oid2name.c (r1.34 -> r1.35)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/oid2name/oid2name.c?r1=1.34&r2=1.35)
    pgsql/contrib/pg_standby:
        pg_standby.c (r1.17 -> r1.18)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_standby/pg_standby.c?r1=1.17&r2=1.18)
    pgsql/contrib/pgbench:
        pgbench.c (r1.84 -> r1.85)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pgbench/pgbench.c?r1=1.84&r2=1.85)
    pgsql/contrib/vacuumlo:
        vacuumlo.c (r1.40 -> r1.41)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/vacuumlo/vacuumlo.c?r1=1.40&r2=1.41)
    pgsql/doc/src/sgml:
        pgstandby.sgml (r2.6 -> r2.7)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/pgstandby.sgml?r1=2.6&r2=2.7)