Leverage cl-tld to validate domains

[Ambrevar]

In particular in input->queries and valid-url-p to get more precise URL / domain validation without expensive system calls.

https://github.com/lu4nx/cl-tld

UPDATE: Fix typo.

[guojing0]

This seems interesting; I will look into it.

Do you mean "to get more precise URL ..."?

[Ambrevar]

Indeed! :)

[hendursaga]

If/when this gets finished, it might be a good idea to request adding Nyxt to the Public Suffix projects' list.

[hendursaga]

I'm not sure how to assign myself, but I'm working on this right now. @Ambrevar when you say "without expensive system calls" are you meaning to search for and remove the check-dns-p logic, or at least set it to NIL by default, in arguments?

[Ambrevar]

Something like that, yes. `check-dns-p` would still be useful because it would check for valid domains, while cl-tld only allows to check for valid tlds, which is more limited. So we would proceed like we do now: - 1st pass: syntax check using cl-tld. This yields a bunch of prompt buffer suggestions, possibly with false positives. - 2nd pass: DNS checks to filter out the false positives.

[aadcg]

Done in #2081.