Log Message:
-----------
Add new Non-Durable Settings documentation section.
Document that synchronous_commit can lose transactions in a db crash,
not just a OS crash.
Modified Files:
--------------
pgsql/doc/src/sgml:
config.sgml (r1.283 -> r1.284)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/config.sgml?r1=1.283&r2=1.284)
perform.sgml (r1.80 -> r1.81)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/perform.sgml?r1=1.80&r2=1.81)