v5.17.0-beta.1

• Try out the new 'send messages' permission to restrict who can send messages in your groups. Great for organizing an event, making an announcement, or just shouting from the rooftops. All members must be on the latest version of Signal for the setting to appear.
• You can now send messages wherever and whenever you are: on a plane, in a tunnel, or that sad moment when your internet just cut out. It will eventually get through; messages now automatically retry for up to 24 hours.