Tailscale v0.100

Tailscale v0.100 introduces a significant update with a major rewrite of the "magicsock" connection code, enhancing connectivity between peers and optimizing pathfinding through NATs, although it requires both peers to run version 0.100 or later to activate these improvements. The update is available across multiple platforms, including Linux, Windows, macOS, iOS, and Android, with specific instructions for each on how to upgrade. Additional enhancements include improved DNS settings respect on Linux, new menu options on Windows, better error reporting, and more consistent status reporting on Linux. The update aims to refine user experience and connectivity efficiency while inviting feedback for further development.