BuildConfig takes destination SSH configuration, struct with default values provided by the user and merges it together with global SSH default values.

ConnectionTimeout is a default time SSH will wait while connecting to unreachable server.

Port is a default port used for SSH connections.

RetryInterval is a default time how long we wait between SSH connection attempts.

RetryTimeout is a default time after we give up connecting to unreachable server.

SSHAuthSockEnv is environment variable name used for connecting to ssh-agent.

User is a default user used for SSH connections.

Config represents SSH transport configuration.

Dialer represents expected functionality from constructed SSH client.