Allow multiple loggers for osctrl-tls

[javuto]

Overview

Currently only one logger is allowed when shipping logs collected by osctrl-tls. It can be Splunk or Graylog, but only one, although db logger is always enabled, to keep a small window of logs in the backend (postgres).

It would be a good feature to enable the forwarding to multiple loggers, so logs can be replicated easily as they arrive.

[edub0]

ty <3