fix: synchronise access to security key hardware #141
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Accessing the security key hardware simultaneously in multiple goroutines is not supported by pcscd, so instead enforce serialised hardware access by wrapping it in a mutex. Hardware access is encapsulated and exported inside the crypto.PrivateKey returned by Yubikey.PrivateKey, so wrap access to that in a mutex too.
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Accessing the security key hardware simultaneously in multiple goroutines is not supported by pcscd, so instead enforce serialised hardware access by wrapping it in a mutex.
Hardware access is encapsulated and exported inside the crypto.PrivateKey returned by Yubikey.PrivateKey, so wrap access to that in a mutex too.
Closes: #140