Host plain
  PubkeyAcceptedAlgorithms ssh-ed25519,rsa-sha2-512

Host plus
  PubkeyAcceptedAlgorithms +ssh-dss

Host minus
  PubkeyAcceptedAlgorithms -ssh-rsa*,ecdsa-sha2-*

Host caret
  PubkeyAcceptedAlgorithms ^rsa-sha2-512

Host legacy
  PubkeyAcceptedKeyTypes +ssh-dss

Host sha1
  PubkeyAcceptedAlgorithms +ssh-rsa
  HostKeyAlgorithms +ssh-rsa
