Migration to 7.2

A dump/restore using pg_dump is required for those wishing to migrate

data from any previous release. The SELECT ... LIMIT 10,20 syntax will

be removed in 7.3. You should change your queries to use LIMIT 10

OFFSET 20. Also, pg_hba.conf only loads on SIGHUP now.

data from any previous release. In this release, comparisons using "=

NULL" will always return false. Previous releases automatically

transformed this syntax to "IS NULL", which is the standards-

compliant way to do NULL comparisons. The old behavior can be

re-enabled using a postgresql.conf parameter. The SELECT ... LIMIT

#,# syntax will be removed in 7.3. You should change your queries to

use separate LIMIT and OFFSET clauses, e.g. LIMIT 10 OFFSET 20. Also,

pg_hba.conf now only loads on SIGHUP.