Adding upstream version 1.34.4.

Signed-off-by: Daniel Baumann <daniel@debian.org>

plugins/inputs/consul_agent/README.md

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+# Hashicorp Consul Agent Input Plugin
+
+This plugin collects metrics from a [Consul agent][agent]. Telegraf may be
+present in every node and connect to the agent locally. Tested on Consul v1.10.
+
+⭐ Telegraf v1.22.0
+🏷️ server
+💻 all
+
+[agent]: https://developer.hashicorp.com/consul/commands/agent
+
+## Global configuration options <!-- @/docs/includes/plugin_config.md -->
+
+In addition to the plugin-specific configuration settings, plugins support
+additional global and plugin configuration settings. These settings are used to
+modify metrics, tags, and field or create aliases and configure ordering, etc.
+See the [CONFIGURATION.md][CONFIGURATION.md] for more details.
+
+[CONFIGURATION.md]: ../../../docs/CONFIGURATION.md#plugins
+
+## Configuration
+
+```toml @sample.conf
+# Read metrics from the Consul Agent API
+[[inputs.consul_agent]]
+  ## URL for the Consul agent
+  # url = "http://127.0.0.1:8500"
+
+  ## Use auth token for authorization.
+  ## If both are set, an error is thrown.
+  ## If both are empty, no token will be used.
+  # token_file = "/path/to/auth/token"
+  ## OR
+  # token = "a1234567-40c7-9048-7bae-378687048181"
+
+  ## Set timeout (default 5 seconds)
+  # timeout = "5s"
+
+  ## Optional TLS Config
+  # tls_ca = /path/to/cafile
+  # tls_cert = /path/to/certfile
+  # tls_key = /path/to/keyfile
+```
+
+## Metrics
+
+Consul collects various metrics. For every details, please have a look at
+[Consul's documentation](https://www.consul.io/api/agent#view-metrics).
+
+## Example Output