Log Message:
-----------
Add another link of a GUC variable to where it is explained.
Modified Files:
--------------
pgsql/doc/src/sgml:
maintenance.sgml (r1.94 -> r1.95)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/maintenance.sgml?r1=1.94&r2=1.95)