Vendor libkv @ 458977154600b9f23984d9f4b82e79570b5ae12b

Signed-off-by: John Howard <jhoward@microsoft.com>

This also adds go.etcd.io/bbolt as boltdb/bolt is no longer
maintained, and we need etcd-io/bbolt#122 which
was merged in https://github.com/etcd-io/bbolt/releases/tag/v1.3.1-etcd.8
in order to fix moby/libnetwork#1950.

Note that I can't entirely remove boltdb/bolt as it is still used by
other components. Still need to work my way through them.... These include
containerd/containerd (containerd/containerd#2634),
docker/swarmkit; moby/buildkit. And probably more....

vendor.conf

@@ -47,7 +47,7 @@ github.com/sean-/seed e2103e2c35297fb7e17febb81e49b312087a2372
 github.com/hashicorp/go-sockaddr 6d291a969b86c4b633730bfc6b8b9d64c3aafed9
 github.com/hashicorp/go-multierror fcdddc395df1ddf4247c69bd436e84cfa0733f7e
 github.com/hashicorp/serf 598c54895cc5a7b1a24a398d635e8c0ea0959870
-github.com/docker/libkv 1d8431073ae03cdaedb198a89722f3aab6d418ef
+github.com/docker/libkv 458977154600b9f23984d9f4b82e79570b5ae12b
 github.com/vishvananda/netns 604eaf189ee867d8c147fafc28def2394e878d25
 github.com/vishvananda/netlink b2de5d10e38ecce8607e6b438b6d174f389a004e
 
@@ -63,6 +63,7 @@ github.com/hashicorp/consul v0.5.2
 github.com/boltdb/bolt fff57c100f4dea1905678da7e90d92429dff2904
 github.com/miekg/dns v1.0.7
 github.com/ishidawataru/sctp 07191f837fedd2f13d1ec7b5f885f0f3ec54b1cb
+go.etcd.io/bbolt v1.3.1-etcd.8
 
 # get graph and distribution packages
 github.com/docker/distribution 83389a148052d74ac602f5f1d62f86ff2f3c4aa5