func Dial(ctx context.Context, protocol, addr string) (*Conn, error) {
	return DialTimeout(ctx, protocol, addr, 0)
}
func Dial(ctx context.Context, protocol, addr string) (*Conn, error) {
	return DialTimeout(ctx, protocol, addr, 0)
}
func Dial ( ctx context . Context , protocol , addr string ) ( * Conn , error ) { return DialTimeout ( ctx , protocol , addr , 0 ) }
// Dial connects to the address addr on the network protocol.
// The address format is host:port, where host may be a hostname or an IP address.
// Known protocols are "tcp" and "udp".
// The returned connection satisfies net.Conn, and is valid while ctx is valid;
// if the connection is to be used after ctx becomes invalid, invoke SetContext
// with the new context.
Dial connects to the address addr on the network protocol . The address format is host : port where host may be a hostname or an IP address . Known protocols are tcp and udp . The returned connection satisfies net . Conn and is valid while ctx is valid ; if the connection is to be used after ctx becomes invalid invoke SetContext with the new context .