add some cross-linking for easier reference (#5292)

website/source/docs/drivers/external/lxc.html.md

@@ -11,7 +11,7 @@ description: |-
 Name: `lxc`
 
 The `lxc` driver provides an interface for using LXC for running application
-containers. You can download the external LXC driver [here][lxc-driver].
+containers. You can download the external LXC driver [here][lxc-driver]. For more detailed instructions on how to set up and use this driver, please refer to the [LXC guide][lxc-guide].
 
 ~> The LXC client set up has changed in Nomad 0.9. You must use the new [plugin syntax][plugin] and install the external LXC driver in the [plugin_dir][plugin_dir] prior to upgrading. See [plugin options][plugin-options] below for an example. Note the job specification remains the same.
 
@@ -141,6 +141,7 @@ isolation is not supported as of now.
 
 [lxc-create]: https://linuxcontainers.org/lxc/manpages/man1/lxc-create.1.html
 [lxc-driver]: https://releases.hashicorp.com/nomad-driver-lxc
+[lxc-guide]: /guides/external/lxc.html
 [lxc_man]: https://linuxcontainers.org/lxc/manpages/man5/lxc.container.conf.5.html#lbAM
 [plugin]: /docs/configuration/plugin.html
 [plugin_dir]: /docs/configuration/index.html#plugin_dir

website/source/guides/external/lxc.html.md

@@ -18,6 +18,7 @@ documentation.
 
 - Official [LXC][linux-containers] documentation
 - Nomad [LXC][lxc-docs] external driver documentation
+- Nomad LXC external driver [repo][lxc-driver-repo]
 
 ## Estimated Time to Complete
 
@@ -232,6 +233,7 @@ plugin "nomad-driver-lxc" {
 [linux-containers]: https://linuxcontainers.org/lxc/introduction/
 [linux-containers-home]: https://linuxcontainers.org
 [lxc_driver_download]: https://releases.hashicorp.com/nomad-driver-lxc 
+[lxc-driver-repo]: https://github.com/hashicorp/nomad-driver-lxc
 [lxc-docs]: /docs/drivers/external/lxc.html
 [lxc_plugin_options]: /docs/drivers/external/lxc.html#plugin-options
 [plugin_dir]: /docs/configuration/index.html#plugin_dir