Change Blocked Example Port

[AlienHoboken]

The example port (6000) is blocked on modern browsers to prevent cross-protocol scripting attacks to X11 which runs on the same port. Changed to a non-restrictive port (5000) so that people following the deployment guide will not end up with issues such as #126

See these articles for more info: http://www-archive.mozilla.org/projects/netlib/PortBanning.html https://code.google.com/archive/p/browsersec/wikis/Part2.wiki#Port_access_restrictions

[loprima-l]

Hi, I merged the project to a new repo to start maintain it, I would be glad if you can put your pull request here : https://github.com/loprima-l/nuts-2