GetLeavesByRange. 403 Permission Errors. Signer Metrics.
A new log server RPC API has been added to get leaves in a range. This is a more natural fit for CT type applications as it more closely follows the CT HTTP API.
The server now returns 403 for permission denied where it used to return 500 errors. This follows the behaviour of the C++ implementation.
The log signer binary now reports metrics for the number it has signed and the number of errors that have occurred. This is intended to give more insight into the state of the queue and integration processing.