Added GPL2 header to the terraform bash completion script.

Signed-off-by: Vangelis Tasoulas <vangelis@schibsted.com>

completion/available/terraform.completion.bash

@@ -1,7 +1,22 @@
 #!/usr/bin/env bash
+#
 # Bash completion for the terraform command
+#
+# Copyright (C) 2018 Vangelis Tasoulas
 # 
-# Copyright (c) 2018 Vangelis Tasoulas <vangelis@tasoulas.net>.
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 _terraform() {
 	local cur prev words cword opts