treewide: add license header and enable haslicense linter
Change-Id: I873a8d4082d75e8f813d8a726a41187eea7a065e
Reviewed-on: https://review.monogon.dev/c/monogon/+/3825
Tested-by: Jenkins CI
Reviewed-by: Leopold Schabel <leo@monogon.tech>
diff --git a/cloud/lib/sinbin/sinbin.go b/cloud/lib/sinbin/sinbin.go
index 7c6bf3c..b1c905b 100644
--- a/cloud/lib/sinbin/sinbin.go
+++ b/cloud/lib/sinbin/sinbin.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
// Package sinbin implements a sinbin for naughty processed elements that we wish
// to time out for a while. This is kept in memory, and effectively implements a
// simplified version of the Circuit Breaker pattern.