Fix dialyzer warnings in recent commit

That is recommended since OTP 26, see
 https://www.erlang.org/doc/apps/stdlib/proc_lib.html#init_ack/2
 Warning
 Do not use this function to return an error indicating that the process
 start failed. When doing so the start function can return before the
 failing process has exited, which may block VM resources required for a
 new start attempt to succeed. Use init_fail/2,3 for that purpose.

src/ejabberd_listener.erl

@@ -139,16 +139,13 @@ init({Port, _, udp} = EndPoint, Module, Opts, SockOpts) ->
 			{error, _} ->
 			    ok
 		    end;
-		{error, Reason} = Err ->
-		    report_socket_error(Reason, EndPoint, Module),
-		    proc_lib:init_ack(Err)
+		{error, Reason} ->
+		    return_socket_error(Reason, EndPoint, Module)
 	    end;
-	{{error, Reason} = Err, _} ->
-	    report_socket_error(Reason, EndPoint, Module),
-	    proc_lib:init_ack(Err);
-	{_, {error, Reason} = Err} ->
-	    report_socket_error(Reason, EndPoint, Module),
-	    proc_lib:init_ack(Err)
+	{{error, Reason}, _} ->
+	    return_socket_error(Reason, EndPoint, Module);
+	{_, {error, Reason} } ->
+	    return_socket_error(Reason, EndPoint, Module)
     end;
 init({Port, _, tcp} = EndPoint, Module, Opts, SockOpts) ->
     case {listen_tcp(Port, SockOpts),
@@ -177,16 +174,13 @@ init({Port, _, tcp} = EndPoint, Module, Opts, SockOpts) ->
 			{error, _} ->
 			    ok
 		    end;
-		{error, Reason} = Err ->
-		    report_socket_error(Reason, EndPoint, Module),
-		    proc_lib:init_ack(Err)
+		{error, Reason} ->
+		    return_socket_error(Reason, EndPoint, Module)
 	    end;
-	{{error, Reason}, _} = Err ->
-	    report_socket_error(Reason, EndPoint, Module),
-	    proc_lib:init_ack(Err);
-	{_, {error, Reason}} = Err ->
-	    report_socket_error(Reason, EndPoint, Module),
-	    proc_lib:init_ack(Err)
+	{{error, Reason}, _} ->
+	    return_socket_error(Reason, EndPoint, Module);
+	{_, {error, Reason}} ->
+	    return_socket_error(Reason, EndPoint, Module)
     end.
 
 -spec listen_tcp(inet:port_number(), [gen_tcp:option()]) ->
@@ -608,10 +602,20 @@ config_reloaded() ->
 	      end
       end, New).
 
--spec report_socket_error(inet:posix(), endpoint(), module()) -> ok.
-report_socket_error(Reason, EndPoint, Module) ->
+-spec return_socket_error(inet:posix(), endpoint(), module()) -> no_return().
+return_socket_error(Reason, EndPoint, Module) ->
     ?ERROR_MSG("Failed to open socket at ~ts for ~ts: ~ts",
-	       [format_endpoint(EndPoint), Module, format_error(Reason)]).
+               [format_endpoint(EndPoint), Module, format_error(Reason)]),
+    return_init_error(Reason).
+
+-ifdef(OTP_BELOW_26).
+return_init_error(Reason) ->
+    proc_lib:init_ack({error, Reason}).
+-else.
+-spec return_init_error(inet:posix()) -> no_return().
+return_init_error(Reason) ->
+    proc_lib:init_fail({error, Reason}, {exit, normal}).
+-endif.
 
 -spec format_error(inet:posix() | atom()) -> string().
 format_error(Reason) ->

src/mod_conversejs.erl

@@ -69,7 +69,7 @@ process([], #request{method = 'GET', host = Host, q = Query, raw_path = RawPath1
             {<<"default_domain">>, Domain},
             {<<"domain_placeholder">>, Domain},
             {<<"registration_domain">>, Domain},
-            {<<"assets_path">>, RawPath},
+            {<<"assets_path">>, <<RawPath/binary, "/">>},
             {<<"view_mode">>, <<"fullscreen">>}
            | ExtraOptions],
     Init2 =