Refactor install_server and improve template

- No need to check which system we are on. The init info are comments
  and do not interfere with update_rc.d systems. Additionally:
     Ubuntu/debian by default does not come with chkconfig, but does
     issue a warning if init info is not available.
- Using \n an \" to be able to store this in a variable that cannot be
  overridden has no upsides. Use Mr. Heredoc's cat.
- Improve template to provide a status command.