Added 'syslog_output' support.

I added 'syslog_output' support.  This can help out in a decentralized or dynamic environment, where you might have to use OSSEC in local mode, but want to ship alerts somewhere, without the complexity of agent mode or an OSSEC server.

FYI: OSSEC ships via UDP, so you might want to use rsyslog or nxlog locally to relay this reliably, via TCP. If you want to secure the transport as well, I'd  suggest NXlog's SSL output module.
I followed the syntax of the existing ```node['ossec']['user']['remote_syslog']```
To be honest, I'm not entirely sure what that even does in this recipe.  Also, this is applicable to local or server mode.