add URLs for failed openQA tests, allow specifying base URL
    
    This is slightly messy, but the best I can come up with; I was
    gonna have the code catch when the openQA server is 'localhost'
    and try to determine the real base URL from openqa.ini but
    that's pretty rinky-dink. Ideally openQA's API would actually
    include a URL for the test in the results, but it doesn't, I
    may look into adding that.