[arch-dev-public] [signoff] cryptsetup 1.4.0-2

Upstream update. This also adds the new (optional) options field to cryptsetup. If you use a SSD, you can change cryptdevice=/dev/foo:bar to cryptdevice=/dev/foo:bar:allow-discards to enable discard functionality on the crypto mapping. In -2, I fixed a bug in "cryptsetup status" for plain volumes where the key size would always be displayed as 0.