Update redis host settings docs (elastic#16518)

* Update redis host settings docs

The redis host setting accepts passwords and URL schemas by now.
This change update the reference config files and docs.

auditbeat/auditbeat.reference.yml

@@ -800,6 +800,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The

filebeat/filebeat.reference.yml

@@ -1505,6 +1505,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The

heartbeat/heartbeat.reference.yml

@@ -944,6 +944,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The

journalbeat/journalbeat.reference.yml

@@ -738,6 +738,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The

libbeat/_meta/config.reference.yml.tmpl

@@ -681,6 +681,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The

libbeat/outputs/redis/docs/redis.asciidoc

@@ -48,6 +48,12 @@ distributed to the servers in the list. If one server becomes unreachable, the e
 distributed to the reachable servers only. You can define each Redis server by specifying
 `HOST` or `HOST:PORT`. For example: `"192.15.3.2"` or `"test.redis.io:12345"`. If you
 don't specify a port number, the value configured by `port` is used.
+Configure each Redis server with an `IP:PORT` pair or with a `URL`. For
+example: `redis://localhost:6379` or `rediss://localhost:6379`.
+URLs can include a server-specific password. For example: `redis://:password@localhost:6379`.
+The `redis` scheme will disable the `ssl` settings for the host, while `rediss`
+will enforce TLS.  If `rediss` is specified and no `ssl` settings are
+configured, the output uses the system certificate store.
 
 ===== `index`
 

metricbeat/metricbeat.reference.yml

@@ -1492,6 +1492,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The

packetbeat/packetbeat.reference.yml

@@ -1227,6 +1227,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The

winlogbeat/winlogbeat.reference.yml

@@ -723,6 +723,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The

x-pack/auditbeat/auditbeat.reference.yml

@@ -856,6 +856,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The

x-pack/filebeat/filebeat.reference.yml

@@ -2051,6 +2051,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The

x-pack/metricbeat/metricbeat.reference.yml

@@ -1725,6 +1725,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The

x-pack/winlogbeat/winlogbeat.reference.yml

@@ -726,6 +726,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The