docs: Sync sample.conf for recent features (#11348)

plugins/inputs/cloudwatch/sample.conf

@@ -27,7 +27,8 @@
   ##   ex: endpoint_url = "http://localhost:8000"
   # endpoint_url = ""
 
-  ## Set http_proxy (telegraf uses the system wide proxy settings if it's is not set)
+  ## Set http_proxy
+  # use_system_proxy = false
   # http_proxy_url = "http://localhost:8888"
 
   # The minimum period for Cloudwatch metrics is 1 minute (60s). However not all

plugins/inputs/redis/sample.conf

@@ -24,6 +24,9 @@
   ## specify server password
   # password = "s#cr@t%"
 
+  ## specify username for ACL auth (Redis 6.0+)
+  # username = "default"
+
   ## Optional TLS Config
   # tls_ca = "/etc/telegraf/ca.pem"
   # tls_cert = "/etc/telegraf/cert.pem"

plugins/inputs/x509_cert/sample.conf

@@ -21,3 +21,7 @@
   # tls_cert = "/etc/telegraf/cert.pem"
   # tls_key = "/etc/telegraf/key.pem"
   # tls_server_name = "myhost.example.org"
+
+  ## Set the proxy URL
+  # use_proxy = true
+  # proxy_url = "http://localhost:8888"

plugins/outputs/datadog/sample.conf

@@ -9,7 +9,8 @@
   ## Write URL override; useful for debugging.
   # url = "https://app.datadoghq.com/api/v1/series"
 
-  ## Set http_proxy (telegraf uses the system wide proxy settings if it isn't set)
+  ## Set http_proxy
+  # use_system_proxy = false
   # http_proxy_url = "http://localhost:8888"
 
   ## Override the default (none) compression used to send data.

plugins/outputs/websocket/sample.conf

@@ -24,6 +24,10 @@
   # socks5_username = "alice"
   # socks5_password = "pass123"
 
+  ## Optional HTTP proxy to use
+  # use_system_proxy = false
+  # http_proxy_url = "http://localhost:8888"
+
   ## Data format to output.
   ## Each data format has it's own unique set of configuration options, read
   ## more about them here: