update envoy sha#2048

Merged

istio-testing merged 3 commits intoistio:release-1.1from

GregHanson:release-1.1

Dec 3, 2018

Commits on Nov 29, 2018

update envoy sha
GregHanson
committed

Commits on Nov 30, 2018

update envoy SHA to 48b161ee02f4ca77b8c26959c4058456ad3f197f (#2041)

vadimeisenbergibm
authored and
GregHanson
committed
Forward Downstream SNI filter (#2045)

vadimeisenbergibm
authored and
GregHanson
committed