pgsql: Arrange for indexes and toast tables to inherit their ownership

Log Message:
-----------
Arrange for indexes and toast tables to inherit their ownership from
the parent table, even if the command that creates them is executed by
someone else (such as a superuser or a member of the owning role).
Per gripe from Michael Fuhr.

Modified Files:
--------------
    pgsql/src/backend/bootstrap:
        bootparse.y (r1.77 -> r1.78)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/bootstrap/bootparse.y.diff?r1=1.77&r2=1.78)
    pgsql/src/backend/catalog:
        heap.c (r1.289 -> r1.290)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/catalog/heap.c.diff?r1=1.289&r2=1.290)
        index.c (r1.259 -> r1.260)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/catalog/index.c.diff?r1=1.259&r2=1.260)
    pgsql/src/backend/commands:
        cluster.c (r1.138 -> r1.139)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/cluster.c.diff?r1=1.138&r2=1.139)
        tablecmds.c (r1.169 -> r1.170)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/tablecmds.c.diff?r1=1.169&r2=1.170)
    pgsql/src/backend/executor:
        execMain.c (r1.254 -> r1.255)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/execMain.c.diff?r1=1.254&r2=1.255)
    pgsql/src/backend/utils/cache:
        relcache.c (r1.227 -> r1.228)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/cache/relcache.c.diff?r1=1.227&r2=1.228)
    pgsql/src/include/catalog:
        heap.h (r1.74 -> r1.75)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/heap.h.diff?r1=1.74&r2=1.75)