':return: A byte-string, as we would send to the wire, containing:
HTTP/1.1 /login.html 200
Header1: Value1
Header2: Value2'

def dump_response_head(self):

    status_line = self.get_status_line()
    dumped_headers = self.dump_headers()
    dump_head = ('%s%s' % (status_line, dumped_headers))
    if isinstance(dump_head, unicode):
        dump_head = dump_head.encode(self.charset, 'replace')
    return dump_head
