src: micro-optimize ALPN negotiation
99 out of a 100 times (conservative estimate!) the negotiated protocol will be either "h2" or "http/1.1" so reuse an existing JS string for those instead of creating a new one every time.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
99 out of a 100 times (conservative estimate!) the negotiated protocol will be either "h2" or "http/1.1" so reuse an existing JS string for those instead of creating a new one every time.