mod_dav: Make sure that when we prepare an If URL for Etag comparison,

we compare unencoded paths. PR 53910
Patch submitted by Timothy Wood <tjw omnigroup com>
Tested by William Lewis <wiml omnigroup com>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1470940 13f79535-47bb-0310-9956-ffa450edef68