Merge component 'engine' from git@github.com:moby/moby 19.03

Author: GordonTheTurtle

components/engine/vendor.conf

@@ -50,7 +50,7 @@ github.com/hashicorp/go-sockaddr                    c7188e74f6acae5a989bdc959aa7
 github.com/hashicorp/go-multierror                  886a7fbe3eb1c874d46f623bfa70af45f425b3d1 # v1.0.0
 github.com/hashicorp/serf                           598c54895cc5a7b1a24a398d635e8c0ea0959870
 github.com/docker/libkv                             458977154600b9f23984d9f4b82e79570b5ae12b
-github.com/vishvananda/netns                        7109fa855b0ff1ebef7fbd2f6aa613e8db7cfbc0
+github.com/vishvananda/netns                        db3c7e526aae966c4ccfa6c8189b693d6ac5d202
 github.com/vishvananda/netlink                      a2ad57a690f3caf3015351d2d6e1c0b95c349752
 
 # When updating, consider updating TOMLV_COMMIT in hack/dockerfile/install/tomlv.installer accordingly