docs: correct api/envoy/service/auth/v2 docs#6211

Merged

mattklein123 merged 3 commits intoenvoyproxy:masterfrom

LukeShu:lukeshu/ext-authz-grpc-docs

Mar 25, 2019

Commits on Mar 7, 2019

api/envoy/service/auth/v2/*.proto: Improve documentation comments
LukeShu
committed

Commits on Mar 19, 2019

api/envoy/service/auth/v2/attribute_context.proto: Add a hyperlink
LukeShu
committed

Commits on Mar 23, 2019

api/envoy/service/auth/v2/attribute_context.proto: Use :repo: for the link
LukeShu
committed