dl: add go1.16rc1

Change-Id: If4f8f7cf86b0749524a7f6f0de6a73083131811e
Reviewed-on: https://go-review.googlesource.com/c/dl/+/287612
Trust: Alexander Rakoczy <alex@golang.org>
Run-TryBot: Alexander Rakoczy <alex@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
diff --git a/go1.16rc1/main.go b/go1.16rc1/main.go
new file mode 100644
index 0000000..c55b264
--- /dev/null
+++ b/go1.16rc1/main.go
@@ -0,0 +1,24 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// The go1.16rc1 command runs the go command from Go 1.16rc1.
+//
+// To install, run:
+//
+//     $ go get golang.org/dl/go1.16rc1
+//     $ go1.16rc1 download
+//
+// And then use the go1.16rc1 command as if it were your normal go
+// command.
+//
+// See the release notes at https://tip.golang.org/doc/go1.16
+//
+// File bugs at https://golang.org/issues/new
+package main
+
+import "golang.org/dl/internal/version"
+
+func main() {
+	version.Run("go1.16rc1")
+}