anchor.diff:  
   ===== enabled
   
  -Boolean option that enables lumberjack output. The default is true.
  +Boolean option that enables logstash output. The default is true.
   
   ===== hosts
   
  
positive.code: Currently the following output types are supported:
  
  * Elasticsearch
  * Lumberjack (Logstash)
  * Redis
  * File
  
  
negative.code: 
  ===== tls
  
  TLS configuration like root CA for the logstash connections. See
  <<configuration-output-tls>> for TLS options. If missing or tls.disabled is set to
  true, a TCP only connection is assumed. Logstash must also be configured to use
  TCP for logstash input.
  
  ===== timeout
  
  Logstash connection timeout waiting for responses from logstash server.
  
  ===== max_retries
  
  