* misc.c (pct_expando): %t means extension, not name ("jpg", not "jpeg").
* keyserver.c (keyserver_spawn), photoid.c (show_photos), exec.h, exec.c:
Allow the caller to determine the temp file extension when starting an
exec_write and change all callers.
functions to return data about an image.
* packet.h, parse-packet.c (make_attribute_uidname,
parse_attribute_subpkts, parse_attribute), photoid.h, photoid.c
(show_photos): Handle multiple images in a single attribute packet.
* main.h, misc.c (pct_expando), sign.c (mk_notation_and_policy), photoid.c
(show_photos): Simpler expando code that does not require using
compile-time string sizes. Call image_type_to_string to get image strings
(i.e. "jpg", "image/jpeg"). Change all callers.
* keyedit.c (menu_showphoto), keylist.c (list_keyblock_print): Allow
viewing multiple images within a single attribute packet.
* gpgv.c: Various stubs for link happiness.
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.
