context: mention standard library version in package comment
Fixes golang/go#22322
Change-Id: I1f0c62ce1c247b583de51faef8722d07e627b441
Reviewed-on: https://go-review.googlesource.com/72570
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/context/context.go b/context/context.go
index d3681ab..a3c021d 100644
--- a/context/context.go
+++ b/context/context.go
@@ -5,6 +5,8 @@
// Package context defines the Context type, which carries deadlines,
// cancelation signals, and other request-scoped values across API boundaries
// and between processes.
+// As of Go 1.7 this package is available in the standard library under the
+// name context. https://golang.org/pkg/context.
//
// Incoming requests to a server should create a Context, and outgoing calls to
// servers should accept a Context. The chain of function calls between must
