improved CSS optimize transform to allow for query params in URLs mentioned in CSS; thanks pruzand; fixes #16834; !strict

git-svn-id: http://svn.dojotoolkit.org/src/util/trunk@31254 560b804f-0ae3-0310-86f3-f6aa0a117693
(cherry picked from commit 6a5a4b60f1800add6c80af189956217a410f829b)