Features: - Automatic, periodic garbage collection of local cache entries older than the maximum cache age. - Ability to purge the local cache via client API and front-end. - Approximate local cache size can be retrieved via the client API and front-end. Enhancements: - Unify client endpoints to `127.0.0.1:8077` (HTTP proxy) and `127.0.0.1:8078` (front-end) by default and enable both by default. - Update readme to remove obsolete information and better help testing. - More efficient URI swarm name computations. - Use newer OpenSSL library. - Use a non-dummy version number in the client API, and have proper release notes. `;)` Bugfixes: - Avoid issues with BitTorrent bootstrap nodes resolving to an IPv6 address first. - Avoid the agent from furiously retrying when there is no fresh mechanism available. - Other fixes for Android and asynchronous operations, timeouts and cancellations.