relay: Send back CONNECTION_REFUSED on reentry

David Gouletrequested to merge
dgoulet/tor:ticket40270_045_01 into maint-0.4.5

The TORPROTOCOL reason causes the client to close the circuit which is not what we want because other valid streams might be on it.

Instead, CONNECTION_REFUSED will leave it open but will not allow more streams to be attached to it. The client then open a new circuit to the destination.

Closes #40270 (closed)

Signed-off-by: David Goulet dgoulet@torproject.org

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