fix: handle SIGHUP from OpenSSH#10638
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johnstcn
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Fixes an issue where remote forwards are not correctly torn down when using OpenSSH with
coder ssh --stdio. OpenSSH sends a disconnect signal, but then also sends SIGHUP tocoder. Previously, we just exited when we got SIGHUP, and this raced against properly disconnecting.Fixes https://github.com/coder/customers/issues/327