openpgp: Implement proper handling of nested signatures.

  - Outer signatures are over any inner signatures and the intervening
    content.  Since outer signatures are notarizations, they should
    treat literal data packets the same way normal signatures (i.e.,
    inner most signatures) do and ignore the filename, date,
    etc. fields when hashing the content.

  - Add a test vector for this, and an example that creates these
    kinds of notarizations.

  - Fixes #29.

1 files changed, 0 insertions, 0 deletions

diff --git a/openpgp/tests/data/messages/signed-1-notarized-by-ed25519.pgp b/openpgp/tests/data/messages/signed-1-notarized-by-ed25519.pgp
new file mode 100644
index 00000000..251bce08
--- /dev/null
+++ b/openpgp/tests/data/messages/signed-1-notarized-by-ed25519.pgp