SilenceRange explanation

Hello. Could you add more information about the `SilenceRange`? I don't understand what its semantics are. For example, when you try to disable warnings, all memory region is initialized with zeros. Should it be like this? I didn't find any information about this in the [documentation](https://renode.readthedocs.io/en/latest/basic/logger.html#hushing-excessive-unhandled-access-logs).