The README, CODE_OF_CONDUCT, and other files contain references to audacityteam.org webpages and email addresses. These should probably be changed.

First check

• I added a very descriptive title to this issue.
• I used the GitHub search to find a similar issue and didn't find it.
• I searched the FastAPI documentation, with the integrated search.
• I already searched in Google "How to X in FastAPI" and didn't find any information.
• I already read and followed all the tutorial in the docs and didn't find an answ

Here is a list of links that return 404

https://apility.io/apidocs/
http://developer.linkedin.com/docs/rest-api
https://sentim-api.herokuapp.com/ works
https://quarantine.country/coronavirus/api/ works

https://blog.mugenmonkey.com/2017/09/10/ds3-api.html
https://developer.walmartlabs.com/docs
https://taylor.rest

Please feel free to add more broken links when you find t

Abstract

The compiler is pretty lax about command-line options whose values it does not use and just ignores many of them. It should report errors instead.

Over time we've started adding checks against this (e.g. #9075, #9364) they they're still very incomplete.

Motivation

Not getting an error when an option is invalid makes it harder for the user to realize that. It's especially pro