Log Message:
-----------
Add URL for cached copy of paper as SGML comment.
Modified Files:
--------------
pgsql/doc/src/sgml:
biblio.sgml (r1.25 -> r1.26)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/biblio.sgml.diff?r1=1.25&r2=1.26)