[Kiraprint]

Closes #61.

iroh-ssh server opens a TCP connection to the local sshd at startup, reads the banner and drops it. sshd sees a real connection being opened and closed without a handshake:

sshd-session[4449]: Connection from ::1 port 43360 on ::1 port 22 rdomain ""
sshd-session[4449]: kex_exchange_identification: Connection closed by remote host [preauth]

--no-probe skips is_ssh_server_available():

iroh-ssh server --no-probe

Default behaviour is unchanged — the check still runs and still fails fast when nothing answers on the port:

$ iroh-ssh server --ssh-port 2299
SSH server not available on port 2299, incoming connections will fail. ...
Error: no ssh server available on specified port

$ iroh-ssh server --ssh-port 2299 --no-probe
Waiting for incoming connections...
Press Ctrl+C to exit

18 insertions / 2 deletions: a skip_server_probe builder flag, the --no-probe arg on server, and a guard around the probe.

Two notes:

• I named it --no-probe after your first suggestion; happy to rename to --skip-server-probe if you prefer.
• service install does not forward the flag yet — the installed unit still probes. Say the word and I'll thread it through ServiceParams in a follow-up (or in this PR if you'd rather have it complete).

[rustonbsd]

Hi, @Kiraprint, thank you for both the PRs! I will take a look in the next couple of days as soon as I have some time. They both look good to me, the no-probe just cleans up a todo and can probably be merged in as is and the relay url fix (adding the missing wiring through to the proxy command) is also needed, there I just have to merge my changes to the address lookup code with the relay changes.

Actually looks like it might not even interfere with my address lookup changes at all, will look at it in more detail in a bit ^^

[rustonbsd]

Hi @Kiraprint @Kirgod666, thanks for the PR, will look at your relay one next.

All tested on windows and linux with and without server and service, merge ready.