Add support for MinIO (and other S3-compatible storages)

[kakoni]

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withPathStyleAccessEnabled(true) needs to be enabled in AmazonS3ClientBuilder in order for this plugin to work with MinIO.

This PR ads new configuration option path_style_access which lets you configure this behavior.

[dmikurube]

Thanks for your contrubution.

Can you add some information that supports :

withPathStyleAccessEnabled(true) needs to be enabled in AmazonS3ClientBuilder in order for this plugin to work with MinIO.

For example, AWS API Doc or SDK Javadoc, MinIO Doc, and/or else...