The primary need for this is x/net/context now is just a type alias to
the stdlib context package.
This makes issues with conflicts between "golang.org/x/net/context" and
the stdib "context" go away (primarily a concern in interface
definitions/implementations).
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Upstream-commit: 848ef1da8b0d1c01a84fbe215f24f00fa741690d
Component: engine