The `repository:shortid` syntax for referencing images is very little used,
collides with with tag references can be confused with digest references.
The `repository:shortid` notation was deprecated in Docker 1.13 through
5fc71599a0b77189f0fedf629ed43c7f7067956c, and scheduled for removal
in Docker 17.12.
This patch removes the support for this notation.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Upstream-commit: a942c92dd77aff229680c7ae2a6de27687527b8a
Component: engine
600655d01d