TLSd reads space-separated hosts and services (ports) from its
stdin, and initiates connections with those.
When TLSd runs child processes, it sets the following environment variables:
Peer’s fingerprint: SHA256 hash of their certificate.
Either ‘CLIENT’ or ‘SERVER’, indicates what side of the connection we are on.
A child process can read peer’s messages from
stdin, and send
messages to a peer by writing them into