[Feature Request] Support for Encoding data using Netflow

[xucito]

Support for Encoding data using Netflow when outputting

• Version: 7.2
• Sample Usage:

    udp {
      id => "udp_exporter"
      codec => netflow
      host => "10.10.10.10"
      port => 2055
    }

[sshaygan]

I also have this issue, we have sflow input and want to export some of the traffic after filtering to PMACCT which only support netflow/sflow/IPFIX. Any suggestion about achiving this?