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>
Upstream-commit: 4a0704cdbd1805d0d9ef046eb62a77352f1feab0
Component: engine