This commit fixes a documentation installation
issue (for debian packaging) and generally brings
the installation control files up to date (as for
the rest of the components).
- Authentication is done using the Hashicorp Vault's token
authentication method;
- If additional client authentication is required, then the
path to the CA authentication bundle file may be passed
as a plugin parameter;
- The creation of the keys and their management is carried
out using the Hashicorp Vault KMS and their tools;
- Key values stored as hexadecimal strings;
- Key values caching is supported.
- Implemented a time-invalidated cache for key values and
for key version numbers received from the Hashicorp Valult
server;
- The plugin uses libcurl (https) as an interface to
the HashiCorp Vault server;
- JSON parsing is performed through the JSON service
(through the include/mysql/service_json.h);
- HashiCorp Vault 1.2.4 was used for development and testing.
