S3 input output plugin might leak passwords

[nicenemo]

When you use minio or another S3 provider that uses path_style for buckets and
do not configure this with the force_path_style then logstash while fail with
a stacktrace which contains the S3 secret key. This was tested with secret key
and key identifier present in the config. Not tested with a config file yet.
probably config file is better.

[aaf1097]

@kares Is this still available to work on, if so I'd like to have a go at it?

[yaauie]

@aaf1097 you are welcome to take a shot. The code-base for the S3 input plugin is https://github.com/logstash-plugins/logstash-input-s3