I'm looking at a package (GLFW, bindings to OpenGL from Haskell) which
has the following licence. I think that it is DFSG-free, but I'd like
someone else to check over it, as I've not seen a licence exactly like
this one before.
Copyright (c) 2007 Paul H. Liu <firstname.lastname@example.org>
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