The detection of registry modules will have to happen in mutliple
phases. The go-getter interface requires that the detector return the
final URL, while we won't know that until we verify which version we
need. This leaves the regisry sources broken, to be re-integrated in a
following commit.
Removed some of the test cases that we don't allow in the svchost
package. Will check back if those are needed in the registry and work
around them as necessary.