Add license info to Go files

tools/utils/io.go

@@ -1,3 +1,5 @@
+// License: GPLv3 Copyright: 2022, Kovid Goyal, <kovid at kovidgoyal.net>
+
 package utils
 
 import (

tools/utils/paths.go

@@ -1,3 +1,5 @@
+// License: GPLv3 Copyright: 2022, Kovid Goyal, <kovid at kovidgoyal.net>
+
 package utils
 
 import (

tools/utils/select_posix.go

@@ -1,3 +1,5 @@
+// License: GPLv3 Copyright: 2022, Kovid Goyal, <kovid at kovidgoyal.net>
+
 //go:build !darwin
 
 package utils

tools/utils/select_without_pselect.go

@@ -1,3 +1,4 @@
+// License: GPLv3 Copyright: 2022, Kovid Goyal, <kovid at kovidgoyal.net>
 //go:build darwin
 
 package utils

tools/utils/sockets.go

@@ -1,3 +1,5 @@
+// License: GPLv3 Copyright: 2022, Kovid Goyal, <kovid at kovidgoyal.net>
+
 package utils
 
 import (

tools/utils/sockets_test.go

@@ -1,3 +1,5 @@
+// License: GPLv3 Copyright: 2022, Kovid Goyal, <kovid at kovidgoyal.net>
+
 package utils
 
 import (

tools/utils/types.go

@@ -1,3 +1,5 @@
+// License: GPLv3 Copyright: 2022, Kovid Goyal, <kovid at kovidgoyal.net>
+
 package utils
 
 type RemoteControlCmd struct {

tools/utils/utf-8.go

@@ -1,3 +1,5 @@
+// License: GPLv3 Copyright: 2022, Kovid Goyal, <kovid at kovidgoyal.net>
+
 package utils
 
 // UTF-8 decode taken from: https://bjoern.hoehrmann.de/utf-8/decoder/dfa/