Support myxql

[phihos]

Hi,

I wondered if you are interested in supporting myxql as well. I already got it to run and with a bit of polishing I could create a PR.

[crbelaus]

Hi @phihos. Supporting MySQL would be great.

The infrastructure for supporting different database adapters is already in place, so adding support for MySQL shouldn't be too much work. Please, feel free to open a PR.