[19.03] update libnetwork b9bcf0c3fba9ef8897c9676c5b70ba0345b84b17

full diff: moby/libnetwork@0941c3f...b9bcf0c

- moby/libnetwork#2545 Fix NPE due to null value returned by ep.Iface()
    - backport of moby/libnetwork#2544
    - addresses moby/moby#37506

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Upstream-commit: a6beb24dc5aec6d5919f40728720bd9c61259b15
Component: engine

Author: thaJeztah

components/engine/vendor.conf

@@ -38,7 +38,7 @@ github.com/gofrs/flock                              7f43ea2e6a643ad441fc12d0ecc0
 # libnetwork
 
 # When updating, also update LIBNETWORK_COMMIT in hack/dockerfile/install/proxy.installer accordingly
-github.com/docker/libnetwork                        0941c3f409260d5f05cfa6fc68420d8ad45ee483 # bump_19.03 branch
+github.com/docker/libnetwork                        b9bcf0c3fba9ef8897c9676c5b70ba0345b84b17 # bump_19.03 branch
 github.com/docker/go-events                         9461782956ad83b30282bf90e31fa6a70c255ba9
 github.com/armon/go-radix                           e39d623f12e8e41c7b5529e9a9dd67a1e2261f80
 github.com/armon/go-metrics                         eb0af217e5e9747e41dd5303755356b62d28e3ec