Graham Land 0a703fda30 Docs: Add example for Vault init Auto Unseal with PGP Keys (#5951)
* Add example for AWS KMS AutoUnseal with PGP Keys

A customer could not figure how to get this working today. 
This example would have helped them. We don't mention KMS anywhere in this section.

* Changed reference from AWS KMS to Auto Unseal

``` bash
Initialize Auto Unseal, but encrypt the recovery keys with pgp keys:
```
2018-12-18 11:42:10 -05:00
..