add config comments about zrtp-passthru and late negotiation

conf/insideout/sip_profiles/external.xml

@@ -48,7 +48,7 @@
     <param name="auth-calls" value="false"/>
     <param name="rtp-timeout-sec" value="1800"/>
     <param name="inbound-late-negotiation" value="true"/>
-    <param name="inbound-zrtp-passthru" value="true"/>
+    <param name="inbound-zrtp-passthru" value="true"/> <!-- (also enables late negotiation) -->
     <!--
         DO NOT USE HOSTNAMES, ONLY IP ADDRESSES IN THESE SETTINGS!
     -->

conf/insideout/sip_profiles/internal-ipv6.xml

@@ -69,7 +69,7 @@
     <!-- Let calls hit the dialplan before selecting codec for the a-leg -->
     <param name="inbound-late-negotiation" value="true"/>
 
-    <!-- Allow ZRTP clients to negotiate end-to-end security associations -->
+    <!-- Allow ZRTP clients to negotiate end-to-end security associations (also enables late negotiation) -->
     <param name="inbound-zrtp-passthru" value="true"/>
 
     <!-- this lets anything register -->

conf/insideout/sip_profiles/internal.xml

@@ -104,7 +104,7 @@
     <!-- Let calls hit the dialplan before selecting codec for the a-leg -->
     <param name="inbound-late-negotiation" value="true"/>
 
-    <!-- Allow ZRTP clients to negotiate end-to-end security associations -->
+    <!-- Allow ZRTP clients to negotiate end-to-end security associations (also enables late negotiation) -->
     <param name="inbound-zrtp-passthru" value="true"/>
 
     <!-- this lets anything register -->

conf/sbc/sbc_profiles/external.xml

@@ -49,7 +49,7 @@
     <param name="auth-calls" value="false"/>
     <param name="rtp-timeout-sec" value="1800"/>
     <param name="inbound-late-negotiation" value="true"/>
-    <param name="inbound-zrtp-passthru" value="true"/>
+    <param name="inbound-zrtp-passthru" value="true"/> <!-- (also enables late negotiation) -->
     <!--
         DO NOT USE HOSTNAMES, ONLY IP ADDRESSES IN THESE SETTINGS!
     -->

conf/sbc/sbc_profiles/internal-ipv6.xml

@@ -69,7 +69,7 @@
     <!-- Let calls hit the dialplan before selecting codec for the a-leg -->
     <param name="inbound-late-negotiation" value="true"/>
 
-    <!-- Allow ZRTP clients to negotiate end-to-end security associations -->
+    <!-- Allow ZRTP clients to negotiate end-to-end security associations (also enables late negotiation) -->
     <param name="inbound-zrtp-passthru" value="true"/>
 
     <!-- this lets anything register -->

conf/sbc/sbc_profiles/internal.xml

@@ -110,7 +110,7 @@
     <!-- Let calls hit the dialplan before selecting codec for the a-leg -->
     <param name="inbound-late-negotiation" value="true"/>
 
-    <!-- Allow ZRTP clients to negotiate end-to-end security associations -->
+    <!-- Allow ZRTP clients to negotiate end-to-end security associations (also enables late negotiation) -->
     <param name="inbound-zrtp-passthru" value="true"/>
 
     <!-- this lets anything register -->

conf/vanilla/sip_profiles/external.xml

@@ -57,7 +57,7 @@
     <param name="nonce-ttl" value="60"/>
     <param name="auth-calls" value="false"/>
     <param name="inbound-late-negotiation" value="true"/>
-    <param name="inbound-zrtp-passthru" value="true"/>
+    <param name="inbound-zrtp-passthru" value="true"/> <!-- (also enables late negotiation) -->
     <!--
         DO NOT USE HOSTNAMES, ONLY IP ADDRESSES IN THESE SETTINGS!
     -->

conf/vanilla/sip_profiles/internal-ipv6.xml

@@ -70,7 +70,7 @@
     <!-- Let calls hit the dialplan before selecting codec for the a-leg -->
     <param name="inbound-late-negotiation" value="true"/>
 
-    <!-- Allow ZRTP clients to negotiate end-to-end security associations -->
+    <!-- Allow ZRTP clients to negotiate end-to-end security associations (also enables late negotiation) -->
     <param name="inbound-zrtp-passthru" value="true"/>
 
     <!-- this lets anything register -->

conf/vanilla/sip_profiles/internal.xml

@@ -222,7 +222,7 @@
     <!-- Let calls hit the dialplan before selecting codec for the a-leg -->
     <param name="inbound-late-negotiation" value="true"/>
 
-    <!-- Allow ZRTP clients to negotiate end-to-end security associations -->
+    <!-- Allow ZRTP clients to negotiate end-to-end security associations (also enables late negotiation) -->
     <param name="inbound-zrtp-passthru" value="true"/>
 
     <!-- this lets anything register -->

src/mod/endpoints/mod_sofia/conf/sofia.conf.xml

@@ -266,7 +266,7 @@
         <!-- Let calls hit the dialplan before selecting codec for the a-leg -->
         <param name="inbound-late-negotiation" value="true"/>
 
-        <!-- Allow ZRTP clients to negotiate end-to-end security associations -->
+        <!-- Allow ZRTP clients to negotiate end-to-end security associations (also enables late negotiation) -->
         <param name="inbound-zrtp-passthru" value="true"/>
 
         <!-- this lets anything register -->