Brad Fitzpatrick 910682c851 control/controlclient: avoid crash sending map request with zero node key
Fixes #1271

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
(cherry picked from commit 7529b7401846813beeb58593f2b201169d0469c8)
2021-02-05 10:04:03 -08:00
..