on request of h00die

Convert this to string interpolation (using double quotes like line 121)

Author: xychix

modules/exploits/linux/smtp/harakiri.rb

@@ -118,7 +118,7 @@ def exploit
         srv_host = datastore['SRVHOST']
       end
 
-      service_url = 'http://' + srv_host + ':' + datastore['SRVPORT'].to_s + resource_uri
+      service_url = "http://#{srv_host}:#{datastore['SRVPORT'].to_s}#{resource_uri}"
       service_url_payload = srv_host + resource_uri
       print_status("#{rhost}:#{rport} - Starting up our web service on #{service_url} ...")
       start_service({'Uri' => {