Enstore Chimera Info extractor
    Enstore storageinfo URI contains original_name as a part of the query
    Special characters in the file name cause failure to create an URI with
    subsequent failure to stage the file in leaving stage request in suspended
    state.
    This patch addresses it:
      1) introduces uri_encode/uri_decode strorage procedures
      2) modifies ChimeraEnstoreStorageInfoExtractor class
         to handle both encoded and un-encoded file names

    Acked-by: Tigran Mkrtchyan
    Patch: http://rb.dcache.org/r/6043/
    Target: trunk
    Request: 2.2
    Request: 2.6
    Require-book: no
    Require-notes: yes