https://community.highlandarrow.com/notice/269667
or alternatively: https://social.umeahackerspace.se/conversation/495655

Also move fancyurlfix into site-wide $config['fix']['fancyurls']

TODO: getByUri should make use of this directly I guess?

This will probably cause older oEmbed images not to show, since they
probably were updated to use empty url entries because they were thought
of as local ones. During a migration period maybe you want to change
the default value of notNullUrl to 'false' in File_thumbnail::byFile(...)

The risk of injection attacks using HTTP is too great to allow a
site that allows both HTTP and HTTPS...

Won't work with common_purify yet because there is no geo uri scheme for it

If we reallyreally want to include <img> or <script> or whatever then we
have to do that after Notice::saveActivity sets ->rendered.

If we reallyreally want to include <img> or <script> or whatever then we
have to do that after Notice::saveActivity sets ->rendered.

and automatically identifies _which_ columns are the right ones,
so for example 'uri' primary keys don't need to be explicitly set

save File and File_redirection records in File_redirection::where(), because then we will have to run where() over and over again

Regular expression + avoid-redirection list now match each other.

Now we just have to accept the 'media' or 'media_data' (base64 encoded)
POST arguments instead of $_FILES uploads.