Log Message:
-----------
Improve table describing shared memory parameters.
Modified Files:
--------------
pgsql/doc/src/sgml:
runtime.sgml (r1.350 -> r1.351)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/runtime.sgml.diff?r1=1.350&r2=1.351)