Cleanup legal data

1. The license header is technically not valid if it doesn't have a
copyright signature.

2. The COPYING file has been updated with the different licenses used in
the project.

3. The full GPLv2 header in each file annoys me.

1 files changed, 70 insertions, 1 deletions

diff --git a/COPYING b/COPYING
index 75bc6a1fe..4c02dbcf3 100644
--- a/COPYING
+++ b/COPYING
@@ -1,11 +1,17 @@
+ libgit2 is Copyright (C) 2009-2011 the libgit2 contributors,
+ unless otherwise stated. See the AUTHORS file for details.
 
  Note that the only valid version of the GPL as far as this project
  is concerned is _this_ particular version of the license (ie v2, not
  v2.2 or v3.x or whatever), unless explicitly otherwise stated.
 
+----------------------------------------------------------------------
+
+			LINKING EXCEPTION
+
  In addition to the permissions in the GNU General Public License,
  the authors give you unlimited permission to link the compiled
- version of this file into combinations with other programs,
+ version of this library into combinations with other programs,
  and to distribute those combinations without any restriction
  coming from the use of this file.  (The General Public License
  restrictions do apply in other respects; for example, they cover
@@ -354,3 +360,66 @@ proprietary programs.  If your program is a subroutine library, you may
 consider it more useful to permit linking proprietary applications with the
 library.  If this is what you want to do, use the GNU Library General
 Public License instead of this License.
+
+----------------------------------------------------------------------
+
+The bundled ZLib code is licensed under the ZLib license:
+
+Copyright (C) 1995-2010 Jean-loup Gailly and Mark Adler
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+
+  Jean-loup Gailly        Mark Adler
+  jloup@gzip.org          madler@alumni.caltech.edu
+
+----------------------------------------------------------------------
+
+The priority queue implementation is based on code licensed under the
+Apache 2.0 license:
+
+	Copyright 2010 Volkan Yazıcı <volkan.yazici@gmail.com>
+	Copyright 2006-2010 The Apache Software Foundation
+
+The full text of the Apache 2.0 license is available at:
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+----------------------------------------------------------------------
+
+The Clay framework is licensed under the MIT license:
+
+Copyright (C) 2011 by Vicent Marti
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+