This was missing in the earlier f5eac39ea7 and meant that tsnet users weren't getting (all of) acme support. Thanks to @ChaosInTheCRD and @BeckyPauley for debugging. Updates #12614 Updates #20252 Change-Id: I176a7b179b2ad3726aca484057f0aae7cc3561c8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>