
Since some time Nixos has firewall enabled by default, so update example. Also, remove newline escaping (it isn't needed). Closes https://github.com/NixOS/nixpkgs/issues/25174
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at http://nixos.org/nixos and in the manual in doc/manual.