anchor.diff:              documentRoot = "/data/webroot-bar";
             }
           ];
  +        type = with types; listOf optionSet;
           description = ''
             Specification of the virtual hosts served by Apache.  Each
             element should be an attribute set specifying the
  
positive.code: {config, pkgs, ...}:
  
  let
    inherit (pkgs.lib) mkOption addDefaultOptionValues;
  
    perServerOptions = {forMainServer}: {
  
  
negative.code:           are the non-global options permissible for the main host.
          '';
  
          options = [
            vhostOptions
          ];
        };
  
      }
      // perServerOptions {forMainServer = true;}
      ;
    };
  }
  