Improve -vv and --help

[DL6ER]

What does this implement/fix?

This PR adds colors (if supported by the terminal) to verbose version output and completely revamps the help function.
When the "consumer" is not a terminal (e.g. a pipe), no escape sequences will be added.

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pihole-FTL -vv BEFORE

pihole-FTL -vv NOW

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pihole-FTL -h BEFORE

pihole-FTL -h NOW

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Related issue or feature (if applicable): N/A

Pull request in docs with documentation (if applicable): N/A

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By submitting this pull request, I confirm the following:

1. I have read and understood the contributors guide, as well as this entire template. I understand which branch to base my commits and Pull Requests against.
2. I have commented my proposed changes within the code.
3. I am willing to help maintain this change if there are issues with it later.
4. It is compatible with the EUPL 1.2 license
5. I have squashed any insignificant commits. (git rebase)

Checklist:

• The code change is tested and works locally.
• I based my code and PRs against the repositories developmental branch.
• I signed off all commits. Pi-hole enforces the DCO for all contributions
• I signed all my commits. Pi-hole requires signatures to verify authorship
• I have read the above and my PR is ready for review.

[yubiuser]

--hash, d, handling of --(dnsmasq options), -q are missing from the help section.

(Some more as well, but I think the above should be part of the help text)

[rdwebdesign]

This is one thing I don't like in codespell.

You had to change a perfectly correct line of code (and removed some text: "the optional") just to please the checker.

[DL6ER]

Thanks for your comments. -q makes only sense in combination with regex-test which is why I mention it only there.

I added the missing bits with the exception of the -- pass-through. It seems a dangerous idea and I don't think we have ever advertised to be able to do it. Really, all configuration should be done using config files, instead. It was added in v5.0 when we added the drop-in binary support but this -- was probably just a bad idea.

I'll leave the code here in case you still think we need it:

			printf("\t%s-- args...%s          Collect arguments behind %s--%s for\n", green, normal, green, normal);
			printf("\t                    the embedded dnsmasq server\n");

I also don't think we should always include all variants of an option, e.g, --test as alternative to dnsmasq-test as this may cause further confusion with the option option test. We can still leave it in there for any scripts that may be using it.

Furthermore, I replaced -- --help dhcp and -- --help dhcp6 by ``--list-dhcpand--list-dhcp6`, respectively. I checked Discourse, our docs and also asked Google whether the old syntax is mentioned anywhere and found no results. This isn't something you'd be using in a script so the change should be without any adverse consequences.

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Updated screenshot:

[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-ftl-v5-20-and-web-v5-18-released/59959/1

[pralor-bot]

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

https://discourse.pi-hole.net/t/v6-development-branch-man-page-gone/72644/8