One Copyright Update to rule them all

As many open source projects have started doing it, we're removing the
current year from the copyright notice, so that we don't need to bump
it every year.

It seems like only the first year of publication is technically
relevant for copyright notices, and even that seems to be something
that many companies stopped listing altogether (in a version controlled
codebase, the commits are a much better source of date of publication
than a hardcoded copyright statement).

We also now list Godot Engine contributors first as we're collectively
the current maintainers of the project, and we clarify that the
"exclusive" copyright of the co-founders covers the timespan before
opensourcing (their further contributions are included as part of Godot
Engine contributors).

Also fixed "cf." Frenchism - it's meant as "refer to / see".

Author: akien-mga

COPYRIGHT.txt

@@ -43,8 +43,8 @@ Source: https://github.com/godotengine/godot
 
 Files: *
 Comment: Godot Engine
-Copyright: 2007-2022, Juan Linietsky, Ariel Manzur.
- 2014-2022, Godot Engine contributors.
+Copyright: 2014-present, Godot Engine contributors
+ 2007-2014, Juan Linietsky, Ariel Manzur
 License: Expat
 
 Files: ./icon.png
@@ -59,8 +59,8 @@ Files: ./core/math/convex_hull.cpp
  ./core/math/convex_hull.h
 Comment: Bullet Continuous Collision Detection and Physics Library
 Copyright: 2011, Ole Kniemeyer, MAXON, www.maxon.net
- 2007-2022, Juan Linietsky, Ariel Manzur.
- 2014-2022, Godot Engine contributors.
+ 2014-present, Godot Engine contributors
+ 2007-2014, Juan Linietsky, Ariel Manzur
 License: Expat and Zlib
 
 Files: ./platform/android/java/lib/aidl/com/android/*
@@ -81,8 +81,8 @@ License: Apache-2.0
 Files: ./scene/animation/easing_equations.h
 Comment: Robert Penner's Easing Functions
 Copyright: 2001, Robert Penner
- 2007-2022 Juan Linietsky, Ariel Manzur.
- 2014-2022 Godot Engine contributors.
+ 2014-present, Godot Engine contributors
+ 2007-2014, Juan Linietsky, Ariel Manzur
 License: Expat
 
 Files: ./servers/physics_3d/collision_solver_3d_sat.cpp
@@ -106,16 +106,16 @@ Files: ./servers/physics_3d/gjk_epa.cpp
  ./servers/physics_3d/shape_3d_sw.h
 Comment: Bullet Continuous Collision Detection and Physics Library
 Copyright: 2003-2008, Erwin Coumans
- 2007-2022, Juan Linietsky, Ariel Manzur.
- 2014-2022, Godot Engine contributors.
+ 2014-present, Godot Engine contributors
+ 2007-2014, Juan Linietsky, Ariel Manzur
 License: Expat and Zlib
 
 Files: ./servers/physics_3d/joints/cone_twist_joint_3d_sw.cpp
  ./servers/physics_3d/joints/cone_twist_joint_3d_sw.h
 Comment: Bullet Continuous Collision Detection and Physics Library
 Copyright: 2007, Starbreeze Studios
- 2007-2022, Juan Linietsky, Ariel Manzur.
- 2014-2022, Godot Engine contributors.
+ 2014-present, Godot Engine contributors
+ 2007-2014, Juan Linietsky, Ariel Manzur
 License: Expat and Zlib
 
 Files: ./servers/rendering/renderer_rd/shaders/ss_effects_downsample.glsl

LICENSE.txt

@@ -1,5 +1,5 @@
-Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.
-Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).
+Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md).
+Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal