Issue #419: Compatibility with MySQL on alternate port

[totten]

Fixes #419

[yorkshire-pudding]

Hi @totten - please follow the Contributing guidelines - see https://github.com/backdrop-contrib/bee/wiki/Contributing or https://github.com/backdrop-contrib/bee/blob/1.x-1.x/CONTRIBUTING.md

[totten]

@yorkshire-pudding ok, the corresponding issue is #419

Aside: I didn't try adding an automated-test for this because it's essentially an environment issue. It's quite rare for a PHP test-harnesses to provide a clean way to control this part of the environment.

[yorkshire-pudding]

@totten - thanks for creating the issue. One other thing to do; in the description of this PR (starts with Overview), edit, delete what's there and add:
Fixes #419

That will link this request to the issue.

I think you are right that there is no real need for automated tests for this and it would be hard to do, so don't worry about that. I will try and test locally manually.

For now, I'll run the automated tests to check it doesn't break anything.

[yorkshire-pudding]

Look good. Thanks @totten