JosiahWI

I might be interested in working on this myself if we come up with a good solution. I'd like to restate the problem here in case the solutions we proposed...

Yes, thank you so much! Some other bugs cropped up, so I haven't gotten to testing the new method yet, but it looks like a good solution to our problem....

Blocking on #10968 for the OSX build.

The OSX failure is due to a CMake issue present in master. I discussed it with @cmcfarlen and am working on a fix. Marking this as a draft until then.

This is about ready, but I still have to solve the problem of ImageMagick being used both in both the webp_transform and magick plugins.

It was discussed that it is clearer to have auto_options just set the `USE_XXX` variables, and put the logic to add the subdirectories in `experimental/CMakeLists.txt`. I will update the PR...

A CMake issue that caused the necessity for a workaround for ImageMagick is being tracked here: https://gitlab.kitware.com/cmake/cmake/-/issues/25970.

collapseslashes AuTest failed

AuTest `proxy_serve_stale_dns_fail` failed.

I heard some concerns from @cmcfarlen about putting moving this to a "public" header when it was in a "private" one before.