E.226.1. Migration to Version 7.2.4

A dump/restore is not required for those running version 7.2.*.

E.226.2. Changes

• Fix some additional cases of VACUUM "No one parent tuple was found" error

• Prevent VACUUM from being called inside a function (Bruce)

• Ensure pg_clog updates are sync'd to disk before marking checkpoint complete

• Avoid integer overflow during large hash joins

• Make GROUP commands work when pg_group.grolist is large enough to be toasted

• Fix errors in datetime tables; some timezone names weren't being recognized

• Fix integer overflows in circle_poly(), path_encode(), path_add() (Neil)

• Repair long-standing logic errors in lseg_eq(), lseg_ne(), lseg_center()