Log Message:
-----------
Remove link that breaks HISTORY file generation.
Modified Files:
--------------
pgsql/doc/src/sgml:
release-9.0.sgml (r2.26 -> r2.27)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/release-9.0.sgml?r1=2.26&r2=2.27)