* Forward PKI revocation requests received by standby nodes to active node
- A refactoring that occurred in 1.13 timeframe removed what was
considered a specific check for standby nodes that wasn't required
as a writes should be returning ErrReadOnly.
- That sadly exposed a long standing bug where the errors from the
storage layer were not being properly wrapped, hiding the ErrReadOnly
coming from a write and failing the request.
* Add cl
* Add test for basic PKI operations against standby nodes
