Log Message:
-----------
Mention pgpool-II can do Clustering For Parallel Query Execution.
Modified Files:
--------------
pgsql/doc/src/sgml:
high-availability.sgml (r1.6 -> r1.7)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/high-availability.sgml.diff?r1=1.6&r2=1.7)