ssh-dss .dsa user ssh host keys to slogin-serv

The new Ubuntu 16.04 slogin-serv services do not accept the legacy ssh-dss (DSA) public key algorithm.
Any users having problems with their user ssh keys should try connecting to slogin-old using the -v switch to check which key is used.
If it is .dsa, please generate a new key and add it to .ssh/authorized_keys, check that it works on slogin-serv, then remove the old .dsa key and its .ssh/authorized_keys entry.
Remember never to copy the private key – it should only ever remain where it is generated.

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