Log Message:
-----------
Mention two-phase commit for having all transactions commit on all servers.
Modified Files:
--------------
pgsql/doc/src/sgml:
failover.sgml (r1.8 -> r1.9)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/failover.sgml.diff?r1=1.8&r2=1.9)