f79e688e0d
The change in b7e48058c8 was too loose; it also captured the CLI
being run as a child process under cmd/tta.
Updates #13038
Updates #1866
Change-Id: Id410b87132938dd38ed4dd3959473c5d0d242ff5
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>