Item12367: preserve name encoding symmetry in uploads in cached requests

Since the filename for a cached upload is based on the URL-encoded version of
the original filename, we need to use the URL-encoded version when applying
the cached upload, too.


git-svn-id: http://svn.foswiki.org/trunk/core@16456 0b4bb1d4-4e5a-0410-9cc4-b2b747904278