pgsql: Convert remaining builtin set-returning functions to use OUT

Log Message:
-----------
Convert remaining builtin set-returning functions to use OUT parameters, making
it possible to call them without specifying a column list.

Jaime Casanova

Modified Files:
--------------
    pgsql/src/backend/catalog:
        system_views.sql (r1.53 -> r1.54)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/catalog/system_views.sql?r1=1.53&r2=1.54)
    pgsql/src/include/catalog:
        pg_proc.h (r1.511 -> r1.512)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/pg_proc.h?r1=1.511&r2=1.512)
        catversion.h (r1.479 -> r1.480)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/catversion.h?r1=1.479&r2=1.480)
    pgsql/src/test/regress/expected:
        rules.out (r1.140 -> r1.141)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/rules.out?r1=1.140&r2=1.141)