Get logging to work reliably in the python scripts

I think we can merge this and improve it from there.

• Merge branch 'master' into dev/login-as

This may have been discussed elsewhere, but is it actually desirable to have per-user overrides of mail delivery policies?
The external sender warning seems like something potentially security critical that you don't want to have disabled on a per user basis.
The per user setting of the invitation policy is perhaps less critical.

To support delegation, the reject_sender_login_mismatch check has been
removed, so we rely on the access policy to check sender address
ownership.

• Add test cases

renamed scripts, remove mention of spf

Tests in tests/Feature/Policy/SmtpAccessTest.php probably fail, also we should test rate limit there.

I like the registerRoutes() approach.

• Update tests for the IP-to-country change for 127.0.0.0/8 network

• Per-user mail delivery settings
• Move greylist setting into the Mail delivery section
• Tests

• Don't redirect autoconf/autodiscovery requests to Roundcube container

• Remove redundant route

• Refactor, move button/action to the admin API
• Add test