Readme Incorrect information about RHEL based systems.

[nlvw]

nix-user-chroot/README.md

Lines 9 to 13 in cf14c8f

	Run and install nix as user without root permissions. Nix-user-chroot requires
	user namespaces to perform its task (available since linux 3.8). Note that this
	is not available for unprivileged users in some Linux distributions such as
	Red Hat Linux, CentOS when using the stock kernel. It should be
	available in Ubuntu, Debian and Arch Linux.

Unprivileged Namespace support in RHEL family of Linux distributions:

• RHEL 6.x
  • No Support
• RHEL 7.x
  • 7.0 - 7.3 = no support
  • 7.4 - 7.9 = disabled by default
  • Enable instructions:
    • sudo sh -c 'echo user.max_user_namespaces=15000 >/etc/sysctl.d/90-max_user_namespaces.conf'
    • sudo sysctl -p /etc/sysctl.d /etc/sysctl.d/90-max_user_namespaces.conf
• RHEL 8.x and 9.x
  • Enabled by default

[Mic92]

Thanks for the information. Can you update the readme?