Log Message:
-----------
Fix mistaken duplicate reference to max_fsm_pages, per bug #3926.
Also make links clickable.
Modified Files:
--------------
pgsql/doc/src/sgml/ref:
vacuum.sgml (r1.50 -> r1.51)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/vacuum.sgml?r1=1.50&r2=1.51)