grpc contextPkgPath should use "context"

[hzxuzhonghu]

As of Go 1.7 this package(golang.org/x/net/context) is available in the standard library under the name context. https://golang.org/pkg/context. So we should replace grpc contextPkgPath golang.org/x/net/context with context

[awalterschulze]

I am going to wait for golang/protobuf to fix this first
golang/protobuf#537

[hzxuzhonghu]

ok

[awalterschulze]

Sorry that this issue has been delayed for so long.

[saturn4er]

Hi @awalterschulze, golangprotobuf have already merged fix.

[awalterschulze]

Yes it has been merged into their dev branch.
This is a piece of work, of which I have completed the biggest part on the upstream branch.
I will merge this into gogo/protobuf's dev branch and continue to merge all the commits of their dev branch.
If you want to help, it would be great if you could test the upstream branch on your own code base.

[dsnet]

FYI, it's been reverted again... see golang/protobuf#580.
I'm pushing for Go protobufs to drop Go1.6 support.

[awalterschulze]

whop whop :)

Thank you for pushing @dsnet

[dfawley]

I'm pushing for Go protobufs to drop Go1.6 support.

Note that support for Go 1.6 is orthogonal to which context package is imported. We should not change grpc or its plugin to import "context" until 1.9 is the oldest supported version (for type aliases). Also note that anyone using Go 1.9 or later shouldn't care how context is imported.

grpc/grpc-go#711

[thaJeztah]

Looks like this was addressed now through 92e5581 (#533)