docs(plugins): correct comment in plugin docs and restore current plu…

…gin list

Signed-off-by: Jason Dellaluce <jasondellaluce@gmail.com>

content/en/docs/plugins/_index.md

@@ -189,6 +189,12 @@ If you are interested in authoring your own plugin, or modifying an existing plu
 
 Plugins authored by the Falcosecurity community are at the [plugins github repository](https://github.com/falcosecurity/plugins). There, you can also find the [plugin registry](https://github.com/falcosecurity/plugins/blob/master/registry.yaml) containing info about all the plugins officially recognized by the Falcosecurity organization.
 
+Currently, the plugins are:
+* **cloudtrail**: Reads Cloudtrail JSON logs from files/S3 and injects as events.
+* **dummy**: Reference plugin use to document plugins interface.
+* **dummy_c**: Like dummy, but written in C++.
+* **json**: Extracts values from any JSON payload.
+
 ## Plugin SDKs
 
 To facilitate the development of plugins written in Go, we've written a [SDK](https://github.com/falcosecurity/plugin-sdk-go) that provides support code for writing plugins. The SDK provides Go structs/enums corresponding to the C structs/enums used by the API, has utility packages that manage the details of memory management/type conversion, and presents abstract interfaces that provide a more streamlined interface to potential plugin authors.

content/en/docs/plugins/plugin-api-reference.md

@@ -212,7 +212,7 @@ The struct has the following members:
 * `datalen`: pointer to a 32bit integer. The plugin will set it the size of the buffer pointed by data.
 * `ts`: the event timestamp, in nanoseconds since the epoch. Can be (uint64_t)-1, in which case the engine will automatically fill the event time with the current time.
 
-It is not necessary to fill in the evtnum struct member when returning events via plugin_next_batch. Event numbers are assigned by the plugin framework.
+Filling the `evtnum` struct member when returning events via `plugin_next_batch` has no effect, because event numbers are assigned by the plugin framework.
 
 This function should return: