Implement the GetCapabilities call in naughty

This call is required by the freedesktop specification.

Signed-off-by: Uli Schlachter <psychon@znc.in>
Signed-off-by: Julien Danjou <julien@danjou.info>

lib/naughty.lua.in

@@ -486,6 +486,10 @@ if capi.dbus then
     elseif data.member == "GetServerInfo" or data.member == "GetServerInformation" then
         -- name of notification app, name of vender, version
         return "s", "naughty", "s", "awesome", "s", capi.awesome.version:match("%d.%d"), "s", "1.0"
+    elseif data.member == "GetCapabilities" then
+        -- We actually do display the body of the message, we support <b>, <i>
+        -- and <u> in the body and we handle static (non-animated) icons.
+        return "as", { "s", "body", "s", "body-markup", "s", "icon-static" }
     end
     end)
 
@@ -502,6 +506,9 @@ if capi.dbus then
         </method>
       </interface>
       <interface name="org.freedesktop.Notifications">
+        <method name="GetCapabilities">
+          <arg name="caps" type="as" direction="out"/>
+        </method>
         <method name="CloseNotification">
           <arg name="id" type="u" direction="in"/>
         </method>