Relicense to GPL-3.0-or-later

src/seat.zig

@@ -1,8 +1,26 @@
+// This file is part of river, a dynamic tiling wayland compositor.
+//
+// Copyright 2020 Isaac Freund
+//
+// 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 3 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, see <https://www.gnu.org/licenses/>.
+
 const Self = @This();
 
-const c = @import("c.zig");
 const std = @import("std");
 
+const c = @import("c.zig");
+
 const Cursor = @import("cursor.zig");
 const InputManager = @import("input_manager.zig");
 const Keyboard = @import("keyboard.zig");