Properly initialize the user ID refcount for user and photo IDs.
Tweak a few prompts to change "y/n" to "y/N", which is how most other
prompts are written.
Warn the user if they are about to revoke an expired sig (not a problem,
but they should know).
Control-d escapes the keyserver search prompt.
If a subkey is considered revoked solely because the parent key is
revoked, print the revocation reason from the parent key.
Allow revocation/expiration to apply to a uid/key with no entry in the
trustdb.
"http://notary.jabberwocky.com/keysign/%K" to create a per-signature
policy URL. Use the new generic %-handler for the photo ID stuff as well.
Display policy URLs and notations during signature generation if
--show-policy-url/--show-notation is set.
