cqrlogo: add validpgpkeys
journal-notify: add validpgpkeys
mpd-notification: add validpgpkeys
netlink-notify: add validpgpkeys
nthash: add validpgpkeys
nullshell: add validpgpkeys
udev-block-notify: add validpgpkeys
paccache: add validpgpkeys
mysql-workbench: add validpgpkeys
libpng: update to version 1.5.21
lib32-libpng15: update to version 1.5.21