Added failing hotload test for static initonly HashSets Added ConcurrentQueueUpgrader Fixed in-place hotload of a HashSet<T> Allow individual types to be added to hotload SkipUpgrader Skip hotload for types in System.Net.Http and System.Text.RegularExpressions Fixed some false negatives when checking if a type is blittable Added ConcurrentDictionaryUpgrader, fixed ConcurrentQueueUpgrader Only start addon worker threads when first needed Make sure hotload verbose log works with and without -tools Cache which static fields need to be watched in hotload Some extra timing info for hotload