Don't log io.ErrClosedPipe in proxy.
We expect one of these at the end of just about every proxy session, as the Conns in both directions are closed as soon as the copy loop finishes in one direction. Closes #40016.
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We expect one of these at the end of just about every proxy session, as the Conns in both directions are closed as soon as the copy loop finishes in one direction. Closes #40016.