Nginx config: Replace CGI host with includable config

`SCRIPT_NAME` was removed because `alias` sets `$request_filename`
to the full path. Let's hope it works...

conf/nginx/sites-available/example

@@ -14,7 +14,7 @@ server {
 	# PHP processing
 
 	location ~ \.php$ {
-		fastcgi_pass unix:/run/php-fpm.sock;
+		fastcgi_pass unix:/run/php5-fpm.sock;
 		include fastcgi.conf;
 		fastcgi_intercept_errors on;
 	}