Log Message:
-----------
Add SGML markup for on/off values in run-time section.
Modified Files:
--------------
pgsql/doc/src/sgml:
runtime.sgml (r1.334 -> r1.335)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/runtime.sgml.diff?r1=1.334&r2=1.335)