basic-install: document how to continue after SELinux check

[cgzones]

Signed-off-by: Christian Göttsche cgzones@googlemail.com

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What does this PR aim to accomplish?:
Be able to run the installer with SELinux set to enforced default mode.

How does this PR accomplish the above?:
Output steps how to pass the SELinux check after it has stopped the installation.

What documentation changes (if any) are needed to support this PR?:
A detailed list of any necessary changes

Closes: #3556

[bcambl]

@cgzones Thank you for the PR.
May I please ask you to update the PR to use -n instead of ! -z on the variable test?

[pralor-bot]

This pull request has been mentioned on Pi-hole Userspace. There might be relevant details there:

https://discourse.pi-hole.net/t/pi-hole-core-web-v5-2-and-ftl-v5-3-released/40909/1