pginstaller - web: Update instructions for silent installs to reflect

Log Message:
-----------
Update instructions for silent installs to reflect the components that have
been moved over to Stackbuilder as of 8.3.

Modified Files:
--------------
web:
silent.html (r1.10 -> r1.11)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/web/silent.html.diff?r1=1.10&r2=1.11)