fix: path endpoint support

[natjw]

This adds support for path style endpoint connection.
Without this fix, connecting to minio is impossible.

[Frostist]

There is already a repo trying to be merged for this: #716

Already 2 people have said they will test, if you test and It works for you then it can get one step closer to a merge.

[Frostist]

This merge was opened a year ago and where the discussion is currently happening: #670

[natjw]

Hey @Frostist, thank you for the reply. I tested your PR and it is sadly not functional for me.
The bugfixes I did in my PR were necessary to get it working with a local minio.

For example, you set the use_path_style_endpoint to true, even though this should be set based on the value.

I also added a missing exception and a quite important fix that led to massive performance issues with the AWS SDK using the IMS.

Would you be willing to add these fixes to your PR? Then I would be willing to close mine.
I have left you my issues as a review and am willing to test it. As it stands currently, it does not work.

[Frostist]

Go for it. Can you pull your pr into mine?