mfdiff has moved its revision control to git.

Its new upstream home is:
  https://code.launchpad.net/~cloud-images-release-managers/cloud-images/+git/mfdiff

To clone, either:
   git clone https://git.launchpad.net/~cloud-images-release-managers/cloud-images/+git/mfdiff
or
   git clone ssh://git.launchpad.net/~cloud-images-release-managers/cloud-images/+git/mfdiff