Issue 2078: 404 for archive post bad slug

[selaromdotnet]

This is my attempt to set 404 status if an archive has segments (slug) that don't match to a valid path, as described in issue #2078

This does handle bad slugs and pages (such as /archive/page/notanumber and /archive/tag/non-existant-slug but doesn't handle empty pages tags or categories (/archive/tag or /archive/page) as I'm not sure what the best behavior is in that case.

I also didn't add any tests for this, as I haven't explored that area of the solution yet; if that's a requirement to accept the pr I will definitely spend some time reviewing that and see if I can add this as well.

I'd appreciate any feedback on this change, as this is my first attempt at contributing to an OSS project, thanks!

[selaromdotnet]

@dotnet-policy-service agree

[selaromdotnet]

I hope I did that right it said to reply so that's what I did