alternatives to redirection when there is no local node running

[rampall]

When the extension redirects fairdatasociety.bzz.link to fairdatasociety.eth.swarm.localhost:1633:

In the case there is no local node running - maybe it is better to redirect to the original bzz.link URL or show a page with an error message and a link to the original URL somewhere - for the user to navigate away and finish the task he/she was trying to do.