Log Message:
-----------
Split release notes up into smaller sections; easier to read.
Modified Files:
--------------
pgsql/doc/src/sgml:
release.sgml (r1.553 -> r1.554)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/release.sgml?r1=1.553&r2=1.554)