Rudder

When trying to update a node I got the following error:

root@bob:~# rudder agent update
   error: Failed to establish TLS connection: (-1 SSL_ERROR_SSL) tlsv1 alert protocol version 
   error: No suitable server found
R: *********************************************************************************
* rudder-agent could not get an updated configuration from the policy server.   *
* This can be caused by:                                                        *
*   * an agent key that has been changed                                        *
*   * if this node is not accepted or deleted node on the Rudder root server    *
*   * if this node has changed policy server without sending a new inventory    *
* Any existing configuration policy will continue to be applied without change. *
*********************************************************************************
error: Rudder agent promises could not be updated.

This comes from a bad TLS version settings in the cf-agent. It seems to be well configured on the agent but when
capturing a TLS handshake there is a mismatch between the TLS version used.
For some reasons the TLS version is set to 1.0 when the config force 1.2.

It may be related to https://github.com/cfengine/core/pull/3684/files.
Upgrading to 5.0.16+ which brings a more recent version of cfengine fix the problem and force correctly the TLS version to 1.2+.