
Adds missing file from fc12cbfcd3
.
GitHub was having issues earlier and it was all green because the
checks never actually ran, but the DCO non-Actions check at least did,
so "green" and I merged, not realizing it hadn't really run anything.
Updates #3802
Change-Id: I29f605eebe5336f1f3ca28ebb78b092dd99d9fd8
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>