This addresses a regression introduced in 407e3a4,
which turned out to be "too strict", as there's old images that use, for example;

    docker pull python:3.5.1-alpine
    3.5.1-alpine: Pulling from library/python
    unsupported media type application/octet-stream

Before 407e3a4, such mediatypes were accepted;

    docker pull python:3.5.1-alpine
    3.5.1-alpine: Pulling from library/python
    e110a4a17941: Pull complete
    30dac23631f0: Pull complete
    202fc3980a36: Pull complete
    Digest: sha256:f88925c97b9709dd6da0cb2f811726da9d724464e9be17a964c70f067d2aa64a
    Status: Downloaded newer image for python:3.5.1-alpine
    docker.io/library/python:3.5.1-alpine

This patch copies the additional media-types, using the list of types that
were added in a215e15, which fixed a
similar issue.

Signed-off-by: Sebastiaan van Stijn <[email protected]>