crnlib-rs uses a modified ZLIB license.

Copyright (c) 2010-2016 Richard Geldreich, Jr. All rights reserved.
Copyright (C) 2020 Richard Geldreich, Jr. and Clouds Flowing.

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. Any distribution must comply the license of original software (the C
    library), the content of license of original software shows below (crunch/crnlib).
4. This notice may not be removed or altered from any source distribution.


---------------
crunch/crnlib uses a modified ZLIB license. Specifically, it's the same as zlib except that
public credits for using the library are *required*.

Copyright (c) 2010-2016 Richard Geldreich, Jr. All rights reserved.

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.

2. If you use this software in a product, this acknowledgment in the product
documentation or credits is required:

"Crunch Library Copyright (c) 2010-2016 Richard Geldreich, Jr."

3. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.

4. This notice may not be removed or altered from any source distribution.