Update TetGen license info

Closes gh-119

Author: inducer

LICENSE

@@ -2,7 +2,6 @@
 Triangle License
 -------------------------------------------------------------------------------
 
-
 Copyright 1993, 1995, 1997, 1998, 2002, 2005 Jonathan Richard Shewchuk
 2360 Woolsey #H
 Berkeley, California  94705-1927
@@ -47,67 +46,32 @@ free, then you are not required to make any arrangement with me.)
 TetGen License
 -------------------------------------------------------------------------------
 
-The software (TetGen) is licensed under the terms of the  MIT  license
-with the following exceptions:
-
-Distribution of  modified  versions  of this code is permissible UNDER
-THE CONDITION THAT  THIS CODE AND ANY MODIFICATIONS  MADE TO IT IN THE
-SAME SOURCE FILES  tetgen.h AND tetgen.cxx  REMAIN UNDER  COPYRIGHT OF
-THE  ORIGINAL AUTHOR,  BOTH  SOURCE AND OBJECT  CODE  ARE MADE  FREELY
-AVAILABLE  WITHOUT   CHARGE,   AND  CLEAR   NOTICE  IS  GIVEN  OF  THE 
-MODIFICATIONS.
-
-Distribution of this code for  any  commercial purpose  is permissible
-ONLY BY DIRECT ARRANGEMENT WITH THE COPYRIGHT OWNER.
-
-The full  license text is reproduced below.
-
-This means that TetGen is no free software, but for private, research,
-and  educational purposes it  can be  used at  absolutely no  cost and
-without further arrangements.
-
+TetGen is distributed under a dual licensing scheme. You can
+redistribute it and/or modify it under the terms of the GNU Affero
+General Public License as published by the Free Software Foundation,
+either version 3 of the License, or (at your option) any later
+version. A copy of the GNU Affero General Public License is reproduced
+below.
 
-For details, see http://tetgen.berlios.de
+If the terms and conditions of the AGPL v.3. would prevent you from
+using TetGen, please consider the option to obtain a commercial
+license for a fee. These licenses are offered by the Weierstrass
+Institute for Applied Analysis and Stochastics (WIAS). As a rule,
+licenses are provided "as-is", unlimited in time for a one time
+fee. Please send corresponding requests to:
+[email protected]. Please do not forget to include some
+description of your company and the realm of its activities.
 
-==============================================================================
+=====================================================================
+GNU AFFERO GENERAL PUBLIC LICENSE
 
-TetGen
-A Quality Tetrahedral Mesh Generator and 3D Delaunay Triangulator
-Version 1.4 (Released on January 14, 2006).
+Version 3, 19 November 2007
 
-Copyright 2002, 2004, 2005, 2006 
-Hang Si
-Rathausstr. 9, 10178 Berlin, Germany
-[email protected]
-
-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:
-
-Distribution of  modified  versions  of this code is permissible UNDER
-THE CONDITION THAT  THIS CODE AND ANY MODIFICATIONS  MADE TO IT IN THE
-SAME SOURCE FILES  tetgen.h AND tetgen.cxx  REMAIN UNDER  COPYRIGHT OF
-THE  ORIGINAL AUTHOR,  BOTH  SOURCE AND OBJECT  CODE  ARE MADE  FREELY
-AVAILABLE  WITHOUT   CHARGE,   AND  CLEAR   NOTICE  IS  GIVEN  OF  THE 
-MODIFICATIONS.
-
-Distribution of this code for  any  commercial purpose  is permissible
-ONLY BY DIRECT ARRANGEMENT WITH THE COPYRIGHT OWNER.
-
-The  above  copyright  notice  and  this permission  notice  shall  be
-included in all copies or substantial portions of the Software.
+Copyright © 2007 Free Software Foundation, Inc. <http://fsf.org/>
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
 
-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.
+(See src/cpp/tetgen-LICENSE for the full license text)
 
 -------------------------------------------------------------------------------
 Wrapper license

pyproject.toml

@@ -12,7 +12,7 @@ name = "meshpy"
 version = "2025.1.1"
 description = "Triangular and Tetrahedral Mesh Generator"
 readme= "README.rst"
-license = { file = "LICENSE" }
+license-files = ["LICENSE"]
 authors = [{ name = "Andreas Kloeckner", email = "[email protected]" }]
 maintainers = [{ name = "Andreas Kloeckner", email = "[email protected]" }]
 requires-python = ">=3.10"
@@ -21,9 +21,6 @@ classifiers = [
     "Intended Audience :: Developers",
     "Intended Audience :: Other Audience",
     "Intended Audience :: Science/Research",
-    "License :: OSI Approved :: MIT License",
-    "License :: OSI Approved :: GNU Affero General Public License v3",
-    "License :: Free for non-commercial use",
     "Natural Language :: English",
     "Programming Language :: C++",
     "Programming Language :: Python",