Log Message:
-----------
Add steps for creating release notes.
Modified Files:
--------------
pgsql-server/src/tools:
RELEASE_CHANGES (r1.42 -> r1.43)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/tools/RELEASE_CHANGES.diff?r1=1.42&r2=1.43)