Create (or recreate) the actual socket object.

def bind(self, family, type, proto=0):
    """Create (or recreate) the actual socket object."""
    self.socket = sockets.Socket(family, type, proto)
    self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    self.socket.setblocking(0)
    #~ self.socket.setsockopt(socket.SOL_SOCKET, socket.TCP_NODELAY, 1)
    self.socket.bind(self.bind_addr)