MySQL 8 merge needs. Fixes for dbconfig-common.
According to our recent talk on IRC (#debian-devel), @rbasak already asked a small review/feedback about these changes. I tried to address all the concerns spoken at that time. Please let me know if something else is needed or this is okay to be accepted as-is. I have already tried out autopkgtests and all MySQL 8 related issues are fixed (and Maria DB is also good, meaning apparently we did not include any regressions).
Thank you very much in advance for reviewing and considering this. Our intent here is to merge these fixes so Ubuntu has minimum delta possible.
Best Regards Rafael D. Tinoco