Update details about 3rd party encryption tools

Currently our documentation refers to 4 options for on-disk encryption (LUKS, Vormetric, Gemalto, Protegrity).

Vormetric and Gemalto don’t really exist any-more as they were both acquired by Thales and integrated into a new solution.

Can you change the list of 3rd party encryption tools to LUKS, Thales CipherTrust (formerly known as Vormetric/Gemalto), Protegrity

And for CipherTrust can you provide these 2 links ?
https://cpl.thalesgroup.com/encryption/transparent-encryption (Product Details) and
https://thalesdocs.com/ctp/cte/Books/Online-Files/index.html
(Documentation)

This will need changing in all versions of our documentation.