requestsMonitor: handle redirects with local path

$ phantomas --url http://tme.eu --verbose  | grep -i redirect

Redirect: <http://tme.eu/> is a redirect (HTTP 301 Moved Permanently) to <http://www.tme.eu/>
Redirect: <http://www.tme.eu/> is a redirect (HTTP 301 Moved Permanently) to <null>