I can no longer reach any of the websites, including webmail and server-manager. The terminal display shows a constantly repeated message,
Syntax error on line 1087 of /etc/httpd/conf/httpd.conf:
ProxyPass URL must be absolute!
I can't log in at the terminal, but I can log on with PuTTY.
The only thing I can think of is that one of my ProxyPass targets is the Windows Home Server, which has the URL, symbiota.homeserver.com.
What should I do? I'm sure I've seen this problem before here, but a search has not pulled up any threads.