I observed this warning today (seen for the first time since running v2):
2018-12-29 09:04:08.144 [WARN ] [.keygenerator.OpenSSHKeyPairProvider] - Failed to parse keypair in /var/lib/openhab2/etc/host.key. Attempting to parse it as a legacy 'simple' key
2
No idea what it means, or what I should do to get rid of it.