Add wildcard support for the server-side Query Log

[DL6ER]

What does this implement/fix?

Add wildcard support for server-side Query Log for the fields domain, client-ip, client-by-name, and upstream and fix a minor glitch resulting in showing the total number of queries in the last 24 hours even when the timerange was narrowed down.

Instead of the completely random wildcard matching, we decided to opt for "real" wildcards with the wildcard character *. You can get anything ending in google.com - for instance, analytics.google.com - by searching for *google.com (hint: It'd also match google.com itself). But the wildcard implementation presented here goes beyond that, you can use a wildcard in any place you want: *fla*.c* will match cloudflare.com, flamewar.com and others.

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

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

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• The code change is tested and works locally.
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[pralor-bot]

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

https://discourse.pi-hole.net/t/query-log-advanced-filtering-domain-not-working/65694/5

[yubiuser]

Works nicely.

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I don't know if you want to go that step, but sqlite also supports _ as wildcard operator (matches any single char)