Adding upstream version 1.34.4.

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

plugins/inputs/swap/README.md

@@ -0,0 +1,40 @@
+# Swap Input Plugin
+
+The swap plugin collects system swap metrics. This plugin ONLY supports Linux.
+
+For more information on what swap memory is, read [All about Linux swap
+space](https://www.linux.com/news/all-about-linux-swap-space).
+
+## 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 about swap memory usage
+[[inputs.swap]]
+  # no configuration
+```
+
+## Metrics
+
+- swap
+  - fields:
+    - free (int, bytes): free swap memory
+    - total (int, bytes): total swap memory
+    - used (int, bytes): used swap memory
+    - used_percent (float, percent): percentage of swap memory used
+    - in (int, bytes): data swapped in since last boot calculated from page number
+    - out (int, bytes): data swapped out since last boot calculated from page number
+
+## Example Output
+
+```text
+swap total=20855394304i,used_percent=45.43883523785713,used=9476448256i,free=1715331072i 1511894782000000000
+```