Log Message:
-----------
Update high availability documentation with comments from Markus Schiltknecht.
Modified Files:
--------------
pgsql/doc/src/sgml:
high-availability.sgml (r1.22 -> r1.23)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/high-availability.sgml?r1=1.22&r2=1.23)