Changes:
* CVE-2012-3488: PostgreSQL insecure use of libxslt
* CVE-2012-3489: PostgreSQL insecure use of libxml2
* Updates and corrections to time zone data
* Multiple documentation updates and corrections
* Add limit on max_wal_senders
* Fix dependencies generated during ALTER TABLE ADD CONSTRAINT USING INDEX.
* Correct behavior of unicode conversions for PL/Python
* Fix WITH attached to a nested set operation (UNION/INTERSECT/EXCEPT).
* Fix syslogger so that log_truncate_on_rotation works in the first rotation.
* Only allow autovacuum to be auto-canceled by a directly blocked process.
* Improve fsync request queue operation
* Prevent corner-case core dump in rfree().
* Fix Walsender so that it responds correctly to timeouts and deadlocks
* Several PL/Perl fixes for encoding-related issues
* Make selectivity operators use the correct collation
* Prevent unsuitable slaves from being selected for synchronous replication
* Make REASSIGN OWNED work on extensions as well
* Fix race condition with ENUM comparisons
* Make NOTIFY cope with out-of-disk-space
* Fix memory leak in ARRAY subselect queries
* Reduce data loss at replication failover
* Fix behavior of subtransactions with Hot Standby

(adam)