taint: Remove unused variable warnings.
taint2: Remove unused variable warnings.
taint2: Fix some dependency exclusion
taint2: Fixed more memory corruption bugs. Replays now run successfully.
taint2: Restore support for hypercalls and API.

Fix hypercall support and re-establish PPP API so that other plugins can
call in to the new taint API. Much of the old functionality is still
missing.
taint2: Add much better debug logging and fix a memcpy-size bug.
taint2: Add tainted pointer mode; aestest now passes.