🥅 Try up to three times to check for connectivity
🥅 Try up to three times to check for connectivity

Apparently some machines out there are a bit flaky after boot and it can
take a bit for connectivity to work. As suggested by @fieldOfView in

  https://community.octoprint.org/t//177/9

we thus check connectivity three times in a row if negative before
reporting it as negative.

foosel/OctoPrint,foosel/OctoPrint,foosel/OctoPrint,foosel/OctoPrint