This release makes logging more consistent (especially at the client) and offers some goodies for testing and debugging the client from its front-end. Features: - Get the list of groups announced by the client from its front-end (`/groups.txt`). - Toggle log file creation from the client front-end, provide a download link. - Enabling the log file enables debugging and restores the previous log level when disabled, unless the user explicitly changes it in the meanwhile. Enhancements: - More consistent logging: always use the logger (i.e. show DEBUG, WARN, ERROR, INFO tags), fix the log level of many messages (e.g. show requests and responses as DEBUG when debugging. - Use a single log level for all components (i.e. drop the separate log level for the BEP5/HTTP cache). Bugfixes: - Fix content being announced not getting reannounced if reinjected shortly after purging the local cache, when not debugging. - Fix BEP5 swarm status not being reported when enabling debugging at runtime.