Ensure received emails with no chain are signed correctly #170
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If OpenARC is used to verify an inbound email (with no existing chain), then if the email is modified and re-signed, then the chain is broken. This is because OpenARC carries forward the existing none verification status, rather than changing it to a pass as would be expected from this scenario functioning correctly. This commit ensures that a message that was received with none which now has one chain has its cv changed to pass instead of remaining at none.
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Fixes #169. If OpenARC is used to verify an inbound email (with no existing chain), then if the email is modified and re-signed, then the chain is broken. This is because OpenARC carries forward the existing none verification status, rather than changing it to a pass as would be expected from this scenario functioning correctly.
This commit ensures that a message that was received with none which now has one chain has its cv changed to pass instead of remaining at none.