Since Go 1.7, context is a standard package. Since Go 1.9, everything
that is provided by "x/net/context" is a couple of type aliases to
types in "context".
Many vendored packages still use x/net/context, so vendor entry remains
for now.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
The Docker CLI already performs version-checks when
running commands, but other clients consuming the API
client may not do so.
This patch adds a version check to various
client functions.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
