mod_dav: Ensure URI is correctly uriencoded on return.

PR: 54611
Backports: r1476621
Submitted by: Timothy Wood <tjw omnigroup com>
Reviewed by: minfrin, trawick, wrowe



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@1497121 13f79535-47bb-0310-9956-ffa450edef68