This release contains many minor (and not so minor) enhancements, optimizations and fixes after some intensive internal testing. Enhancements: - Improve handling of temporary connectivity losses regarding UPnP, uTP transport and ouiservice listener. - Contact known and local peers while DHT lookups take place, to fail early if they are not available. - Fetch response head from peers in parallel after connecting, to avoid timing out on peers not having a resource we can use. - Fine-tuning of connection and head retrieval operation timeouts. - Better logging in cache client and announcer. Bugfixes: - Assorted fixes to DHT group loading, addition and removal, announcement stop on local cache purge, and readdition of removed entries. - Fixes to several timeouts and deadlocks.