z3 does not support MinIO

[haslersn]

I'd like to use z3 with MinIO, but I think it's currently not possible. The main problem is that z3 always uses virtual hosted style adressing while MinIO by default only supports path style addressing.

Technical details

Here's an example of how to use boto3 to access MinIO, but z3 uses an older version of boto. I think with the older it's possible to enable path style addressing by passing calling_format = boto.s3.connection.OrdinaryCallingFormat() to boto.connect_s3(). However, z3 exposes no way to do so.