downloader: more informative URL printing on unsafe URLs
downloader: more informative URL printing on unsafe URLs

sathieu/stdeb,astraw/stdeb,benthomasson/stdeb,pombredanne/stdeb,LeMeteore/stdeb,astraw/stdeb,benthomasson/stdeb,pombredanne/stdeb,LeMeteore/stdeb,sathieu/stdeb,LeMeteore/stdeb,astraw/stdeb,benthomasson/stdeb,pombredanne/stdeb,sathieu/stdeb