Update example config

etc/telegraf.conf

@@ -121,6 +121,9 @@
   ## HTTP Proxy Config
   # http_proxy = "http://corporate.proxy:3128"
 
+  ## Optional HTTP headers
+  # http_headers = {"X-Special-Header" = "Special-Value"}
+
   ## Compress each HTTP request payload using GZIP.
   # content_encoding = "gzip"
 
@@ -1095,10 +1098,7 @@
 
 # # Read metrics from fail2ban.
 # [[inputs.fail2ban]]
-#   ## fail2ban-client require root access.
-#   ## Setting 'use_sudo' to true will make use of sudo to run fail2ban-client.
-#   ## Users must configure sudo to allow telegraf user to run fail2ban-client with no password.
-#   ## This plugin run only "fail2ban-client status".
+#   ## Use sudo to run fail2ban-client
 #   use_sudo = false
 
 
@@ -1960,13 +1960,9 @@
 #   ## Includes connection time, any redirects, and reading the response body.
 #   # client_timeout = "4s"
 #
-#   ## A list of nodes to gather as the rabbitmq_node measurement. If not
-#   ## specified, metrics for all nodes are gathered.
+#   ## A list of nodes to pull metrics about. If not specified, metrics for
+#   ## all nodes are gathered.
 #   # nodes = ["rabbit@node1", "rabbit@node2"]
-#
-#   ## A list of queues to gather as the rabbitmq_queue measurement. If not
-#   ## specified, metrics for all queues are gathered.
-#   # queues = ["telegraf"]
 
 
 # # Read raindrops stats (raindrops - real-time stats for preforking Rack servers)
@@ -2382,10 +2378,10 @@
 #   ## Use SSL but skip chain & host verification
 #   # insecure_skip_verify = false
 #
-#   ## Data format to output.
+#   ## Data format to consume.
 #   ## Each data format has its own unique set of configuration options, read
 #   ## more about them here:
-#   ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_OUTPUT.md
+#   ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
 #   data_format = "influx"
 
 
@@ -2519,6 +2515,8 @@
 #   servers = ["localhost:1883"]
 #   ## MQTT QoS, must be 0, 1, or 2
 #   qos = 0
+#   ## Connection timeout for initial connection in seconds
+#   connection_timeout = "30s"
 #
 #   ## Topics to subscribe to
 #   topics = [