* main.h, g10.c (main), keylist.c (dump_attribs, set_attrib_fd,

list_keyblock_print, list_keyblock_colon), status.h, status.c
(get_status_string): New --attribute-fd feature to dump the contents of
attribute subpackets for frontends.  If --status-fd is also used, then a
new status tag ATTRIBUTE is provided for each subpacket.

* packet.h, getkey.c (fixup_uidnode, merge_selfsigs_main,
merge_selfsigs_subkey), parse-packet.c (setup_user_id): Keep track of the
expiration time of a user ID, and while we're at it, use the expired flag
from the selfsig rather than reparsing the SIG_EXPIRE subpacket.

* photoid.c (generate_photo_id): When adding a new photo ID, showing the
photo for confirmation is not safe when noninteractive since the "user"
may not be able to dismiss a viewer window. Noted by Timo Schulz.

g10/status.h

@@ -96,6 +96,7 @@
 #define STATUS_SIGEXPIRED       64
 #define STATUS_EXPSIG           65
 #define STATUS_EXPKEYSIG        66
+#define STATUS_ATTRIBUTE        67
 
 /*-- status.c --*/
 void set_status_fd ( int fd );