Thank you for your reply. One problem is that I have tried to let the Eclipse JBOSS plugin fetch the quickstart. But from your comment I conclude that it points to the wrong githup repository.
From where should I download the quickstarts. Any URL for a total download of all quickstarts?
I had another look at what I had downloaded and at last I found the small button on the github pages to download all quickstarts.
To make it run I changed the settings in ~/m2 back to the original and did a import into Eclipse from the downloaded .zip archive.
Reading the README.md it looks as if you have to do:
"mvn clean install wildfly:deploy"
which will deploy the .war file
and of cause the URL looks a little different:
I can't make Eclipse do a "run on server", but that is something else. Not for this discussion.