This field was added in 19515a7ad8,
but looks to be always set for endpoints used, so we can trim remote names
unconditionally.
This option was added for possible future expansion, allowing registry-
mirrors to get the full reference of the image (including domain-name),
for them to host a mirror for multiple upstreams on the same registry.
That approach will unlikely be implemented, and containerd has a different
approach for this, where the reference to the original registry is passed
through a query parameter instead.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
afab765014