There's a lot of confusion around what tailscale status shows, so make it better: show region names, last write time, and put stars around DERP too if active. Now stars are always present if activity, and always somewhere.
Signed-off-by: Sylvain Rabot <sylvain@abstraction.fr>
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>