x/net/webdav: percent-encode D:href in the XML.

Fixes golang/go#13286

Change-Id: If1e727bc18c64232b82484d9e82063cc59bcc826
Reviewed-on: https://go-review.googlesource.com/16859
Reviewed-by: Robert Stepanek <robert.stepanek@gmail.com>
Reviewed-by: Nigel Tao <nigeltao@golang.org>
2 files changed