Cleanup cobra integration
Update windows files for cobra and pflags
Cleanup SetupRootcmd, and remove unnecessary SetFlagErrorFunc.
Use cobra command traversal
Signed-off-by: Daniel Nephin <dnephin@docker.com>
This fixes the hard coded restriction for non-linux platforms to v2 registries. Previously, the check was above the flag parsing, which would overwrite the hard coded value and prevent correct operation. This change also removes the related daemon flag from Windows to avoid confusion, as it has no meaning when the value is going to always be hard coded to true.
Signed-off-by: Stefan J. Wernli <swernli@microsoft.com>