This CA is useful for test suites and the like, but is not an
actually-secure CA, because its secret key material is also published.
I plan to use it for its intended purpose in the notmuch test suite.
It was copied from this Internet Draft:
https://tools.ietf.org/id/draft-dkg-lamps-samples-01.html#name-certificate-authority-certi
Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
