MySQL 8.0: Remove the global scope for sql_log_bin

[morgo]

Feature Request

Is your feature request related to a problem? Please describe:

MySQL 8.0 removes the global scope for sql_log_bin, which was added by accident and doesn't really serve a use case. It is actually dangerous because it disables binary logging in an inconsistent way.

Describe the feature you'd like:

Remove global var sql_log_bin (session var remains)

Describe alternatives you've considered:

This should not require a compatibility mode, it is a very unlikely use case for an app to be using it.

Teachability, Documentation, Adoption, Migration Strategy:

Improves MySQL 8.0 compatibility.