Truncate over-long reason instead of dropping

[armanbilge]

http4s-dom/dom/src/main/scala/org/http4s/dom/WebSocketClient.scala

Lines 102 to 107 in 5a7d490

	// reason must be no longer than 123 bytes of UTF-8 text
	// UTF-8 character is max 4 bytes so we can fast-path
	if (reason.length <= 30 || reason.getBytes.length <= 123)
	Some(reason)
	else
	None