libexif: update to 0.6.21

Signed-off-by: W. Michael Petullo <mike@flyn.org>
libgcrypt: update to 1.6.1

Signed-off-by: W. Michael Petullo <mike@flyn.org>
krb5: update to 1.12.1

Signed-off-by: W. Michael Petullo <mike@flyn.org>
lighttpd: update to 1.4.35

Signed-off-by: W. Michael Petullo <mike@flyn.org>
p910nd: place in printing submenu

Signed-off-by: W. Michael Petullo <mike@flyn.org>