def lookup_server(req)
      @virtual_hosts.find{|s|
        (s[:BindAddress].nil? || req.addr[3] == s[:BindAddress]) &&
        (s[:Port].nil?        || req.port == s[:Port])           &&
        ((s[:ServerName].nil?  || req.host == s[:ServerName]) ||
         (!s[:ServerAlias].nil? && s[:ServerAlias].find{|h| h === req.host}))
      }
    end
def lookup_server(req)
      @virtual_hosts.find{|s|
        (s[:BindAddress].nil? || req.addr[3] == s[:BindAddress]) &&
        (s[:Port].nil?        || req.port == s[:Port])           &&
        ((s[:ServerName].nil?  || req.host == s[:ServerName]) ||
         (!s[:ServerAlias].nil? && s[:ServerAlias].find{|h| h === req.host}))
      }
    end
Finds the appropriate virtual host to handle +req+