The functionality of testdb is now available in pacman. pacman -Dk will
check the local database for consistency, and pacman -Dkk will check the
sync databases.

Note that unlike testdb, you can not specify individual sync databases to
check as sync databases act as a whole and not individually. A single database
can be checked using an alternative pacman.conf file.

Signed-off-by: Allan McRae <allan@archlinux.org>