Backed out 4 changesets (bug 908503) for breaking the Hamachi eng dep build on an otherwise CLOSED TREE

Backed out changeset 476cd5c9c5a9 (bug 908503)
Backed out changeset add95b3c2e7f (bug 908503)
Backed out changeset 30957caad928 (bug 908503)
Backed out changeset f6f386352d12 (bug 908503)