1. The /etc/crypttab was autogenerated during the installation. I never touched it before. The warning was always there.
2. A WARNING, in a file that actually has 1 valid cryptsetup line shouldn't lead to NOT including the cryptsetup tool in the initrd image. It is a WARNING, not an ERROR. That WARNING was not preventing the installation of cryptsetup in the initrd image until I upgrade from 13.04 to 13.10.
It actually is a bug in Ubuntu because:
1. The /etc/crypttab was autogenerated during the installation. I never touched it before. The warning was always there.
2. A WARNING, in a file that actually has 1 valid cryptsetup line shouldn't lead to NOT including the cryptsetup tool in the initrd image. It is a WARNING, not an ERROR. That WARNING was not preventing the installation of cryptsetup in the initrd image until I upgrade from 13.04 to 13.10.