Revert "Merge pull request #378 from lmagyar/pr-virtual-config-file" #404
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Finally I figured out how to do it the correct way: use server key stored in known_hosts file for server "identification".
Paramiko (Python SFTP client) allows to add custom missing host key policy, where we can search the known_hosts file for the server name config option of pftpd, and throw BadHostKeyException and retry without cached DNS-SD connectin info if they differ.
Update: See ZeroconfPolicy class https://github.com/lmagyar/prim-sync/blob/main/prim_sync/__main__.py#L1466