Fix Plugins links

Signed-off-by: Morgan Bauer <mbauer@us.ibm.com>

docs/extend/index.md

@@ -15,8 +15,6 @@ weight = 6
 
 Currently, you can extend Docker by adding a plugin. This section contains the following topics:
 
-* [Understand Docker plugins](plugins.md)
-* [Write a volume plugin](plugins_volumes.md)
-* [Docker plugin API](plugin_api.md)
-
- 
+* [Understand Docker plugins](/extend/plugins)
+* [Write a volume plugin](/extend/plugins_volume)
+* [Docker plugin API](/extend/plugin_api)

docs/extend/plugin_api.md

@@ -16,7 +16,7 @@ Docker Engine.
 
 This page is intended for people who want to develop their own Docker plugin.
 If you just want to learn about or use Docker plugins, look
-[here](plugins.md).
+[here](/extend/plugins).
 
 ## What plugins are
 

docs/extend/plugins.md

@@ -17,7 +17,7 @@ plugins.
 ## Types of plugins
 
 Plugins extend Docker's functionality.  They come in specific types.  For
-example, a [volume plugin](plugins_volume.md) might enable Docker
+example, a [volume plugin](/extend/plugins_volume) might enable Docker
 volumes to persist across multiple Docker hosts.
 
 Currently Docker supports volume and network driver plugins. In the future it
@@ -56,4 +56,4 @@ of the plugin for help. The Docker team may not be able to assist you.
 ## Writing a plugin
 
 If you are interested in writing a plugin for Docker, or seeing how they work
-under the hood, see the [docker plugins reference](plugin_api.md).
+under the hood, see the [docker plugins reference](/extend/plugin_api).

docs/extend/plugins_volume.md

@@ -12,7 +12,7 @@ parent = "mn_extend"
 
 Docker volume plugins enable Docker deployments to be integrated with external
 storage systems, such as Amazon EBS, and enable data volumes to persist beyond
-the lifetime of a single Docker host. See the [plugin documentation](plugins.md)
+the lifetime of a single Docker host. See the [plugin documentation](/extend/plugins)
 for more information.
 
 # Command-line changes