BlaaHund response in text/plain instead text/html

[ulslevpedersen]

Should we change from text/html to text/plain when the http server gives the informational response to any http request?
It will make it nicer to look at in the commandline based programs that run the tests. When used from the browser it looks nice even in plain text.

[schoeberl]

Both is fine for me.

[ulslevpedersen]

Ok, let's try text/plain then.

[schoeberl]

Ok, changed it.