Let ejabberd_stun listen on IPv6 sockets

The stun application now allows IPv6 clients to perform STUN requests
and to allocate TURN relays.

ejabberd.yml.example

@@ -59,6 +59,7 @@ listen:
       /.well-known/acme-challenge: ejabberd_acme
   -
     port: 3478
+    ip: "::"
     transport: udp
     module: ejabberd_stun
     use_turn: true

mix.exs

@@ -90,7 +90,7 @@ defmodule Ejabberd.Mixfile do
      {:stringprep, "~> 1.0"},
      {:fast_yaml, "~> 1.0"},
      {:fast_tls, "~> 1.1"},
-     {:stun, "~> 1.0"},
+     {:stun, git: "https://github.com/processone/stun", ref: "cb6549387e23737f39f44ba7656a351fd7b88c14", override: true},
      {:esip, "~> 1.0.32"},
      {:p1_mysql, "~> 1.0"},
      {:mqtree, "~> 1.0"},

rebar.config

@@ -36,7 +36,7 @@
         {mqtree, ".*", {git, "https://github.com/processone/mqtree", {tag, "1.0.7"}}},
 	{p1_acme, ".*", {git, "https://github.com/processone/p1_acme.git", {tag, "1.0.5"}}},
         {base64url, ".*", {git, "https://github.com/dvv/base64url.git", {tag, "v1.0"}}},
-        {if_var_true, stun, {stun, ".*", {git, "https://github.com/processone/stun", {tag, "1.0.32"}}}},
+        {if_var_true, stun, {stun, ".*", {git, "https://github.com/processone/stun", "cb6549387e23737f39f44ba7656a351fd7b88c14"}}},
         {if_var_true, sip, {esip, ".*", {git, "https://github.com/processone/esip", {tag, "1.0.33"}}}},
         {if_var_true, mysql, {p1_mysql, ".*", {git, "https://github.com/processone/p1_mysql",
                                                {tag, "1.0.15"}}}},

src/ejabberd_stun.erl

@@ -160,7 +160,7 @@ set_certfile(Opts) ->
 listen_opt_type(use_turn) ->
     econf:bool();
 listen_opt_type(ip) ->
-    econf:ipv4();
+    econf:ip();
 listen_opt_type(turn_ip) ->
     econf:ipv4();
 listen_opt_type(auth_type) ->