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/osbase/kmod/manager.go b/osbase/kmod/manager.go
index 6369212..78cc3da 100644
--- a/osbase/kmod/manager.go
+++ b/osbase/kmod/manager.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package kmod
 
 import (
diff --git a/osbase/kmod/manager_test.go b/osbase/kmod/manager_test.go
index 43c9428..2169703 100644
--- a/osbase/kmod/manager_test.go
+++ b/osbase/kmod/manager_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package kmod
 
 import (
diff --git a/osbase/kmod/meta.go b/osbase/kmod/meta.go
index 1c96c46..1eb2c36 100644
--- a/osbase/kmod/meta.go
+++ b/osbase/kmod/meta.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package kmod
 
 import (
diff --git a/osbase/kmod/modinfo.go b/osbase/kmod/modinfo.go
index 5c01681..b778317 100644
--- a/osbase/kmod/modinfo.go
+++ b/osbase/kmod/modinfo.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package kmod
 
 import (
diff --git a/osbase/kmod/radix.go b/osbase/kmod/radix.go
index 1631d87..19898f1 100644
--- a/osbase/kmod/radix.go
+++ b/osbase/kmod/radix.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package kmod
 
 import (
diff --git a/osbase/kmod/radix_test.go b/osbase/kmod/radix_test.go
index e89a514..6185beb 100644
--- a/osbase/kmod/radix_test.go
+++ b/osbase/kmod/radix_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package kmod
 
 import (
diff --git a/osbase/kmod/spec/gomod-generated-placeholder.go b/osbase/kmod/spec/gomod-generated-placeholder.go
index f09cd57..ca2145c 100644
--- a/osbase/kmod/spec/gomod-generated-placeholder.go
+++ b/osbase/kmod/spec/gomod-generated-placeholder.go
@@ -1 +1,4 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package spec
diff --git a/osbase/kmod/syscall.go b/osbase/kmod/syscall.go
index 41d3233..6ca32e1 100644
--- a/osbase/kmod/syscall.go
+++ b/osbase/kmod/syscall.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package kmod
 
 import (