More flexible parameters can be passed

Multiple parameters can now be passed. HTTP "API" has been improved, and url now have to be like "http://<path to morss>/:<param1>:<param2>/<url>". The code handling the parameters parsing is now way cleaner. Debug toggle is now a var, which can be changed with parameters. Also http logging is no longer done into a file, which tended to grow way too fast, while lacking an "error 403 protection", but instead the parameter ":debug" can be passed in the url, and the page will be delivered as "text/plain" with the debug written into it. Therefore some logging had to be moved around, so as not to output anything during http headers definition.
Log generation time
Extra doc for DELAY, for xml cache, & now for etag