Add proxy extension point to overview docs

The 'Extending GIO' section is supposed to list all extension
points, so add the proxy extension point here.

diff --git a/docs/reference/gio/overview.xml b/docs/reference/gio/overview.xml
index a2954b64bcaa5cc59fceba1e9d2f6e9639bede5c..0d5b057de39c8e9fab21b7d9cc18abd2c3e84525 100644 (file)
--- a/docs/reference/gio/overview.xml
+++ b/docs/reference/gio/overview.xml
@@ -528,5 +528,17 @@
         by dconf.
       </para>
    </formalpara>
+
+   <formalpara>
+     <title>G_PROXY_EXTENSION_POINT_NAME</title>
+
+     <para>
+       Allows to provide implementations for network proxying.
+       Implementations of this extension point must provide the
+       #GProxy interface, and must be named after the network
+       protocol they are proxying.
+     </para>
+   </formalpara>
+
   </chapter>
 </part>