Change: Removed explicit dependency to "pas_database" in
"dNG.pas.xhtml.tag_parser.RewriteUserXhtmlMixin"
Fix: Fixed left-over placeholder "[lang]" which should be "__lang__"
Fix: Check for "set_range()" requests to return true for streamer
instances. Fixes requests with no Range requests broken by commit
"549b249637".
Fix: Use "dNG.pas.streamer.HttpWsgi1" to return an empty bytes string on
EOF if used as a file-like object
Trivial: Use "os.path.join()" for formatting paths if applicable