Dedicated Server - gone AWOL

We have an unmanaged server running Apache. An hour ago the site went down and it would not restart. Turned out that listed in httpd.conf could not be found. I commented it out and Apache started up fine.

But where’s gone and why? It’s been in its normal place /dh/apache2/template/lib/modules/ since we got this server 2 years ago. We’ve never touched those files and I’m the only one with su access. Nothing else has gone missing. I’ve done a complete search and is nowhere on the server.

I’m putting this out in case anyone else has similar experience. Could it be a DH update to managed servers accidentally hitting unmanaged servers too?