Change the behaviour of the client to use the new CAInfoCommand support in
cacert-gosigner.
The client has a new mechanism to generate new commands as reaction to
received responses. This functionality is used to retrieve CA certificate
information when certificates previously unknown to the client appear
and to trigger CRL retrieval for new certificates.
New CA certificates announced by the signer are detected and information is
retrieved. The retrieved CA certificate is stored alongside the CRL files
in a configurable directory (defaults to "public" in the working directory
of the signerclient process).
- add callback support to client and handler
- implement support for updating the CA certificates and profiles from
health data of the signer
- implement CRL retrieval from the signer including delta CRL support
- implement error response handling
- add configurable start and interval timers for health and CRL data
