Comment 9 for bug 739495

+1 here as well.

I'm trying to set up a secure Apt archive using ssh to limit access. I'm also making a Debian package to set up access to the archive, so it would be nice to add the Host stanza to a separate file for maintenance reasons.

Methods such as using aliases/scripts to aggregate the various config files before execing ssh won't work for this, as apt-get is not going to call an shell-defined alias.

Guess I'm gonna have to fall back to my old method of using scripts to rewrite /etc/ssh/ssh_config - which is a horrible way to do things. This is precisely why pretty much every major Linux service uses config.d directories instead of monolithic config files. EXCEPT OPENSSH.

This request has now been ignored for 4 years. It would be nice to see some sort of response.