urlHref.php: read url, analyze HTML for <a href

urlHref.php: read url, analyze HTML for <a href

loop
    read an url (i.e. stream) from queue
    analyze it as http: DOMDocument::loadHTML
    find all <a href=
    queue these href-url, 
        if they conform (e.g. same host, no query ....) and not already queued

report stats and times used

problems:
    could not get Connection: keep-alive (not a stream option?)
    we get HTTP/1.1 404 Not Found, and not create page as in firefox
    curl_multi or similar might give more flexibility ...