OpenAL32 Credits

[SkeleDotCpp]

I am using the OpenAL32.dll that comes with SFML, but I have read somewhere that I need to include credits for it, or something of that sort. It might've been in the forums, but I can't find it anymore. I am not sure, if this is still the case, and if it is the case, what exactly do I need to put?

[Laurent]

Website: http://kcat.strangesoft.net/openal.html
License: https://github.com/kcat/openal-soft/blob/master/COPYING

[SkeleDotCpp]

Thank you for the links, but can you explain to me a bit more of what I exactly need to do?
Do I need to include that whole license with the game as a README.txt, or do I put them as text in the game. When the user clicks on the credits button?

And also, this link does not open for me for some reason
http://kcat.strangesoft.net/openal.html

It gives me this error:

kcat.strangesoft.net didn’t send any data.
ERR_EMPTY_RESPONSE