8736fbb754
This provides a mechanism to block, waiting for Tailscale's IP to be ready for a bind/listen, to gate the starting of other services. It also adds a new --assert=[IP] option to "tailscale ip", for services that want extra paranoia about what IP is in use, if they're worried about having switched to the wrong tailnet prior to reboot or something. Updates #3340 Updates #11504 ... and many more, IIRC Change-Id: I88ab19ac5fae58fd8c516065bab685e292395565 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>