Add secure option to NATS output to mirror input

plugins/outputs/nats/README.md

@@ -2,7 +2,7 @@
 
 This plugin writes to a (list of) specified NATS instance(s).
 
-```
+```toml
 [[outputs.nats]]
   ## URLs of NATS servers
   servers = ["nats://localhost:4222"]
@@ -11,9 +11,14 @@ This plugin writes to a (list of) specified NATS instance(s).
   # password = ""
   ## NATS subject for producer messages
   subject = "telegraf"
+
+  ## Use Transport Layer Security
+  # secure = false
+
   ## Optional TLS Config
-  ## CA certificate used to self-sign NATS server(s) TLS certificate(s)
   # tls_ca = "/etc/telegraf/ca.pem"
+  # tls_cert = "/etc/telegraf/cert.pem"
+  # tls_key = "/etc/telegraf/key.pem"
   ## Use TLS but skip chain & host verification
   # insecure_skip_verify = false
 
@@ -23,15 +28,3 @@ This plugin writes to a (list of) specified NATS instance(s).
   ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_OUTPUT.md
   data_format = "influx"
 ```
-
-### Required parameters:
-
-* `servers`:  List of strings, this is for NATS clustering support. Each URL should start with `nats://`.
-* `subject`: The NATS subject to publish to.
-
-### Optional parameters:
-
-* `username`: Username for NATS
-* `password`: Password for NATS
-* `tls_ca`: TLS CA
-* `insecure_skip_verify`: Use SSL but skip chain & host verification (default: false)