metricbeat: Reference docs for current instead of master

extensions/metricbeat/README.md

@@ -31,6 +31,6 @@ Docker container: [Run Metricbeat on Docker][metricbeat-docker].
 
 [Metricbeat documentation][metricbeat-doc]
 
-[metricbeat-config]: https://www.elastic.co/guide/en/beats/metricbeat/master/metricbeat-reference-yml.html
+[metricbeat-config]: https://www.elastic.co/guide/en/beats/metricbeat/current/metricbeat-reference-yml.html
 [metricbeat-docker]: https://www.elastic.co/guide/en/beats/metricbeat/current/running-on-docker.html
 [metricbeat-doc]: https://www.elastic.co/guide/en/beats/metricbeat/current/index.html

extensions/metricbeat/config/metricbeat.yml

@@ -37,7 +37,7 @@ output.elasticsearch:
   password: changeme
 
 ## HTTP endpoint for health checking
-## https://www.elastic.co/guide/en/beats/metricbeat/master/http-endpoint.html
+## https://www.elastic.co/guide/en/beats/metricbeat/current/http-endpoint.html
 #
 
 http.enabled: true

extensions/metricbeat/metricbeat-compose.yml

@@ -14,7 +14,7 @@ services:
       - -e
         # Disable config file permissions checks. Allows mounting
         # 'config/metricbeat.yml' even if it's not owned by root.
-        # see: https://www.elastic.co/guide/en/beats/libbeat/master/config-file-permissions.html
+        # see: https://www.elastic.co/guide/en/beats/libbeat/current/config-file-permissions.html
       - --strict.perms=false
         # Mount point of the host’s filesystem. Required to monitor the host
         # from within a container.