Merge release-1.1 into master#759

Merged

rshriram merged 5 commits intoistio:masterfrom

yangminzhu:merge-1-1

Jan 15, 2019

Commits on Jan 9, 2019

Comment fixes. (#752)
geeknoid
authored
Introduce forward looking MCP enhancements (#741)

ayj
authored and
istio-testing
committed

Commits on Jan 10, 2019

add optional header operations (#753)

kyessenov
authored and
istio-testing
committed

Commits on Jan 11, 2019

Update RBAC for Authorization v2 API. (#748)

yangminzhu
authored and
rshriram
committed

Commits on Jan 15, 2019

Merge branch 'release-1.1' to Master
yangminzhu
committed