dl: add go1.17rc2

Change-Id: If1a5270f95807fb82d844e66ea23636d6c8aeacc
Reviewed-on: https://go-review.googlesource.com/c/dl/+/339249
Trust: Alexander Rakoczy <alex@golang.org>
Run-TryBot: Alexander Rakoczy <alex@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
diff --git a/go1.17rc2/main.go b/go1.17rc2/main.go
new file mode 100644
index 0000000..7618c8b
--- /dev/null
+++ b/go1.17rc2/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 go1.17rc2 command runs the go command from Go 1.17rc2.
+//
+// To install, run:
+//
+//     $ go get golang.org/dl/go1.17rc2
+//     $ go1.17rc2 download
+//
+// And then use the go1.17rc2 command as if it were your normal go
+// command.
+//
+// See the release notes at https://tip.golang.org/doc/go1.17
+//
+// File bugs at https://golang.org/issues/new
+package main
+
+import "golang.org/dl/internal/version"
+
+func main() {
+	version.Run("go1.17rc2")
+}