I was trying to find out why `docker info` was sometimes slow so
plumbing a context through to propagate trace data through.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
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>
