Re: [webrtc-pc] Define what the default RTCDataChannel id is

The default value should be `null`; this is what we decided with issue #795 during a virtual interim. So would adding this sentence to the paragraph above help?

> If the `id` attribute is `undefined` and the DTLS role of the SCTP transport hasn't been negotiated, the `id` attribute will return `null` until the DTLS role is negotiated by [setting an `RTCSessionDescription`](https://www.w3.org/TR/webrtc/#set-description).

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Received on Tuesday, 18 April 2017 22:18:31 UTC