conf: add config files to module directories

The idea here is that the config files in the module directories will
serve as the canonical documentation of all module configuration
options.

src/mod/applications/mod_limit/conf/autoload_configs/limit.conf.xml

@@ -0,0 +1,5 @@
+<configuration name="limit.conf" description="LIMIT Configuration">
+  <settings>
+    <!--<param name="odbc-dsn" value="dsn:user:pass"/>-->
+  </settings>
+</configuration>

src/mod/applications/mod_limit/conf/dialplan/limit.xml

@@ -0,0 +1,14 @@
+<include>
+	<extension name="limit_exceeded">
+		<condition field="destination_number" expression="^limit_exceeded$">
+			<action application="playback" data="/sounds/overthelimit.wav"/>
+			<action application="hangup"/>
+		</condition>
+	</extension>
+
+	<extension name="limit" continue="true">
+		<condition>
+			<action application="limit" data="db $${domain} ${sip_auth_username} ${max_calls}"/>
+		</condition>
+	</extension> 
+</include>