enable inbound-late-negotiation in sample configs

We often tell people to enable this for various reasons; it likely
makes a sensible default.

conf/insideout/sip_profiles/external.xml

@@ -47,6 +47,7 @@
     <param name="nonce-ttl" value="60"/>
     <param name="auth-calls" value="false"/>
     <param name="rtp-timeout-sec" value="1800"/>
+    <param name="inbound-late-negotiation" value="true"/>
     <!--
         DO NOT USE HOSTNAMES, ONLY IP ADDRESSES IN THESE SETTINGS!
     -->

conf/insideout/sip_profiles/internal-ipv6.xml

@@ -66,8 +66,8 @@
     <!--Uncomment to set all inbound calls to proxy media mode-->
     <!--<param name="inbound-proxy-media" value="true"/>-->
 
-    <!--Uncomment to let calls hit the dialplan *before* you decide if the codec is ok-->
-    <!--<param name="inbound-late-negotiation" value="true"/>-->
+    <!-- Let calls hit the dialplan before selecting codec for the a-leg -->
+    <param name="inbound-late-negotiation" value="true"/>
 
     <!-- this lets anything register -->
     <!--  comment the next line and uncomment one or both of the other 2 lines for call authentication -->

conf/insideout/sip_profiles/internal.xml

@@ -101,8 +101,8 @@
     <!--Uncomment to set all inbound calls to proxy media mode-->
     <!--<param name="inbound-proxy-media" value="true"/>-->
 
-    <!--Uncomment to let calls hit the dialplan *before* you decide if the codec is ok-->
-    <!--<param name="inbound-late-negotiation" value="true"/>-->
+    <!-- Let calls hit the dialplan before selecting codec for the a-leg -->
+    <param name="inbound-late-negotiation" value="true"/>
 
     <!-- this lets anything register -->
     <!--  comment the next line and uncomment one or both of the other 2 lines for call authentication -->