Provide a way to turn off query-params

[GoogleCodeExporter]

Query-params allow clients to change the set of filters executed by 
mod_pagespeed, overriding settings in pagespeed.conf &/or .htaccess.

Site owners should have a way to limit or disable this functionality entirely.  
For example, site owners might want to (a) turn off the query-params 
functionality entirely or (b) prevent users from turning on specific filters.

Original issue reported on code.google.com by jmara...@google.com on 7 Apr 2011 at 2:51