Alternate 404 Error Page Based on @DL6ER

[NittanySeaLion]

404 Error Page with commented out redirect

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Looks different:

Adds a comment to allow automatic redirects and makes hyperlink specific for IP addresses.

(Not sure if easier/proper to do an alternate pull request. Feel free to close if not.)

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[NittanySeaLion]

I've also added a commit that fixes a broken web link in DNS settings. According to https://wander.science/projects/dns/dnssec-resolver-test/ "This test was created in May 2012 to measure the adoption of DNSSEC validation in the web. It was running on dnssec.vs.uni-due.de until the University suffered from a ransomware attack in November 2022. In March 2023, it was relaunched on wander.science. Currently, it does not collect any data."

[NittanySeaLion]

I wanted to also fix the adlist link per https://discourse.pi-hole.net/t/urls-on-dashboard-give-a-404/65631?u=blockhead

Not sure where those other commits from others came from

[NittanySeaLion]

Decided to leave it as a customization option, if a user desires.

https://discourse.pi-hole.net/t/error-page-404-etc/65715