Обсуждение: pgsql: Rewrite pg_freespacemap to match the new FSM implementation.

Log Message:
-----------
Rewrite pg_freespacemap to match the new FSM implementation. I missed these
changes from the main FSM commit for some reason.

Modified Files:
--------------
    pgsql/contrib/pg_freespacemap:
        Makefile (r1.4 -> r1.5)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_freespacemap/Makefile?r1=1.4&r2=1.5)
        pg_freespacemap.c (r1.10 -> r1.11)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_freespacemap/pg_freespacemap.c?r1=1.10&r2=1.11)
        pg_freespacemap.sql.in (r1.9 -> r1.10)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_freespacemap/pg_freespacemap.sql.in?r1=1.9&r2=1.10)
        uninstall_pg_freespacemap.sql (r1.3 -> r1.4)

(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_freespacemap/uninstall_pg_freespacemap.sql?r1=1.3&r2=1.4)