v0.8.0-rc3

• Moved private information to trace log level (#321)
• Added private_chat_portal_meta option. This is implicitly enabled when encryption is enabled, it was only added as an option for instances with encryption disabled.
• Removed avatars are now synced properly from Telegram, instead of leaving the last known avatar forever.
• Fixed admin detection on Telegram-side relaybot commands (thanks to @davidmehren in #468)
• Fixed bug handling ChatForbidden when syncing chats (#446)