Redundant requirements for secondary certs on a non-control stream

[LPardue]

The draft states both

The SERVER_CERTIFICATE frame MUST be sent on the control stream. A SERVER_CERTIFICATE frame received on any other stream MUST not be used for server authentication.

and

The SERVER_CERTIFICATE frame applies to the connection, not a specific stream. An endpoint MUST treat a SERVER_CERTIFICATE frame received on any stream other than the control stream as a connection error.

This seems a bit redundant. If you trigger a connection error, then you don't process the frame and so the "MUST not be used for server authentication" can't apply. Consider combining and condensing the requirement text.