Update README.mdown

Author: stupidpupil

README.mdown

@@ -55,6 +55,8 @@ The keyscript uses the [kernel keyring](http://man7.org/linux/man-pages/man7/key
 
 [clevis](https://github.com/latchset/clevis#unlocker-dracut) provides a *dracut*-based unlocker for use with the [tang](https://github.com/latchset/tang) keyserver.
 
+[vaultlocker](https://github.com/openstack-charmers/vaultlocker) provides helpers for unlocking boot drives using keys stored in Hashicorp Vault.
+
 There are a number of variations on using *dropbear* or similar to allow remote, but not unattended, restarts with an encrypted boot.
 
 ## License