Harden

Hightened security for nginx and php5-fpm. 

* App pool php5-fpm changes root to /srv/$userName so it can't execute anything located outside of that structure. 
* Nginx doesn't forward .php-scripts from folders where users can upload their own content.
* Nginx handles but doesn't log access to robots.txt

-f          Attempt to remove the files without prompting for confirmation, regardless of the
                 file's permissions.  If the file does not exist, do not display a diagnostic message
                 or modify the exit status to reflect an error.  The -f option overrides any previous
                 -i options.

-f är alltså där för att inte skicka ut ett felmeddelande utfall filen inte finns.