chore(tests): update S3 compat tests

While present, the S3 compatibility tests were broken (at the very
least when running on Linux) due to a few issues:

- `ubuntu:latest` moving ahead of Python 3.6
- Docker networking not working as expected (host.docker.internal)

This commit fixes the s3 compatibility tests, ensuring they run
properly on linux, and updates the repository to contain some results.

Signed-off-by: vados <vados@vadosware.io>

test/s3/compatibility/s3tests.conf

@@ -4,6 +4,14 @@
 # host set for rgw in vstart.sh
 host = host.docker.internal
 
+## NOTE: if running docker --net=host (e.x. `DOCKER_NET_HOST=y ./run.sh`)
+## then use 'localhost', so the container can more easily access your *local* weed instance
+##
+## This is *unsafe* -- it is possible that this script will do malicious
+## things with host-level access. only run this if you trust the programmatic content of
+## ceph/s3-tests (https://github.com/ceph/s3-tests) which will be using this file
+#host = localhost
+
 # port set for rgw in vstart.sh
 port = 8333