dl: add LICENSE, AUTHORS, CONTRIBUTORS, PATENTS, CONTRIBUTING.md
These files should've been here when the repository was initially
created, but they were unintentionally forgotten. Better late than
never, so add them now.
Fixes golang/go#33942
Change-Id: I59fe6b9a3e2288089eb1211c5dc7f27b675f3d3a
Reviewed-on: https://go-review.googlesource.com/c/dl/+/195439
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/CONTRIBUTORS b/CONTRIBUTORS
new file mode 100644
index 0000000..1fbd3e9
--- /dev/null
+++ b/CONTRIBUTORS
@@ -0,0 +1,3 @@
+# This source code was written by the Go contributors.
+# The master list of contributors is in the main Go distribution,
+# visible at https://tip.golang.org/CONTRIBUTORS.
