pgsql-server: Preliminary release notes for 7.4.4, 7.3.7, 7.2.5.

Log Message:
-----------
Preliminary release notes for 7.4.4, 7.3.7, 7.2.5. Will add to the
back branches later.

Modified Files:
--------------
pgsql-server/doc/src/sgml:
release.sgml (r1.281 -> r1.282)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/doc/src/sgml/release.sgml.diff?r1=1.281&r2=1.282)