Logging level
Introduce a LIBSIGNON_LOGGING_LEVEL environment variable which can be set to "2" in order to enable debugging output (or to "0" to hide also warning messages).
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Introduce a LIBSIGNON_LOGGING_LEVEL environment variable which can be set to "2" in order to enable debugging output (or to "0" to hide also warning messages).