Filerequest: UrlDecode() the request.

Makes things work even if the filename has some URL-disallowed
characters (spaces, utf-8, or otherwise).

src/kits/network/libnetapi/FileRequest.cpp

@@ -23,6 +23,7 @@ BFileRequest::BFileRequest(const BUrl& url, BUrlProtocolListener* listener,
 	BUrlRequest(url, listener, context, "BUrlProtocol.File", "file"),
 	fResult()
 {
+	fUrl.UrlDecode();
 }