The source of a tag operation is allowed to be a 64-character hex
string. This means it should use ParseAnyReference for validation
instead of ParseNormalizedNamed.
This fixes a regression that happened in 17.04.
Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>
Remove forked reference package. Use normalized named values
everywhere and familiar functions to convert back to familiar
strings for UX and storage compatibility.
Enforce that the source repository in the distribution metadata
is always a normalized string, ignore invalid values which are not.
Update distribution tests to use normalized values.
Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
