The xinit program is used to start the X Window System server and a first client program on systems that are not using a display manager such as xdm.
The xinit is not intended for naive users. Instead, site administrators should design user-friendly scripts that present the desired interface when starting up X. The startx script is one such example.
All questions regarding this software should be directed at the Xorg mailing list:
https://lists.x.org/mailman/listinfo/xorg
The master development code repository can be found at:
https://gitlab.freedesktop.org/xorg/app/xinit
Please submit bug reports and requests to merge patches there.
For patch submission instructions, see:
https://www.x.org/wiki/Development/Documentation/SubmittingPatches