Temp. add official root certs to work with new domain

We now are getting proper domains & certificates, to support
this transition smoothly, we add the "normal" systems root cert
explicitly to our custom root cert that we used up until now.

This is required as using the root-cert option prevents the client from
looking at the normal systems root certificates which we would need
in this case.

Once all clients are updated and the service is updated, we can remove
all extra options for TLS certs.

Signed-off-by: Mathias L. Baumann <[email protected]>

Author: Marenz

RELEASE_NOTES.md

@@ -2,13 +2,8 @@
 
 ## Features
 
-* `Dispatch.end_time` has been added to the `Dispatch` class, which is the time when the dispatch ended as calculated by the server. `dispatch-cli` will also print this time.
+* The dispatch client now supports the offical dispatch domain: `grpc://dispatch.eu-1.staging.api.frequenz.com:443`
 
 ## Upgrading
 
 * Renamed `Client` class to `DispatchApiClient` for clarity.
-
-## Bug Fixes
-
-* Fix that `dispatch-cli stream` would try to print an event as dispatch, causing an exception.
-* Fix that `stream()` would not reconnect and just closes the channel upon disconnection.