doesn't support sub protocol and extension ver conn net.Conn ..

RFC 6455: all message from client to server must be masked.

doesn't support sub protocol and extension example: ver conn net.Conn ..

RFC 6455: all message from client to server must be masked.

RFC 6455: All control frames MUST have a payload length of 125 bytes or less and MUST NOT be fragmented.

RFC 6455: All control frames MUST have a payload length of 125 bytes or less and MUST NOT be fragmented.