pgsql: Fix some issues that prevent this file to be processed by

Log Message:
-----------
Fix some issues that prevent this file to be processed by scripts.

While at it, mark a couple of items completed in 8.4:
!   o -Prevent long-lived temporary tables from causing frozen-xid
      advancement starvation

! * -Improve performance of shared invalidation queue for multiple CPUs

Also remove a couple of obsolete assignments.

Modified Files:
--------------
    pgsql/doc:
        TODO (r1.2499 -> r1.2500)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/TODO?r1=1.2499&r2=1.2500)
    pgsql/doc/src/FAQ:
        TODO.html (r1.1005 -> r1.1006)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/TODO.html?r1=1.1005&r2=1.1006)