Log Message:
-----------
Add just-assigned CVE number to release notes for recent security issue.
Modified Files:
--------------
pgsql/doc/src/sgml:
release.sgml (r1.590 -> r1.591)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/release.sgml?r1=1.590&r2=1.591)