Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFV: Import atf-0.21.

Merge ATF 0.16 from vendor/atf/dist.

Provenance: http://code.google.com/p/kyua
Discussed with: gibbs, gnn, keramida, mdf, mlaier,
Discussed with: Garrett Cooper

Bootstrap dist directory from the initial import of ATF 0.16.

Import ATF version 0,16

Discussed with: gibbs, gnn, keramida, mdf, mlaier,
Discussed with: Garrett Cooper