mobinmob

The text of the MIT licence specifies that: "The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software." So, yes they can rename and move the license file. The ACKNOWLEDGEMENTS.md file includes all other licenses for code.

The linux tarball comes with the CF-RSL, an EULA and and an ACKNOWLEDGMENTS.md file that contains 3 licenses and copyrights, including the zig original.

It does, with really minimal conditions (keep the license text and copyrights intact). I do not understand what the problem is. Zen seems to be a hard fork that uses the zig code and sub-licenses it. That may be unfortunate, but it seems perfectly legal.