yubikey-manager: ykman doesn't install on OpenBSD (6.3)

I would like to gather all issues with getting Yubikey Manager to run on OpenBSD with the goal of providing a port (package) for ykman .

1. pyscard doesn’t compile on OpenBSD Resolved by installing port pcsc-lite and the rest of deps from native OpenBSD packages resolves all issues.
2. ykman crashes when a YubiKey is plugged in (but yubikey-personalization works). pscsdmust be running.
3. FIDO: pyu2f doesn’t support OpenBSD, see https://github.com/google/pyu2f/blob/master/pyu2f/hid/__init__.py#L46
4. CCID (oath, piv, …): Fails to connect to device. open_reader doesn’t return any device.
5. OTP: Works! 🎉