If a blank nodeID was previously passed in it resulted in a node list
request. The response would then fail to umarshal into a `Node`
type returning a JSON error.
This adds an extra validation to all inspect calls to check that the ID
that is required is provided and if not return an error.
Signed-off-by: Emil Davtyan <emil2k@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>
