Add the ability to pass options to the Dial application when using the DUNDi

switch in the dialplan by setting the DUNDIDIALARGS channel variable.
(issue #8084, patch by bluecrow76, with small modifications and documentation
updates)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@46781 65c4cc65-6c06-0410-ace0-fbb531ad65f3

doc/channelvariables.txt

@@ -696,6 +696,12 @@ DUNDiLookup() uses the following variables
 ${DUNDTECH}	* The Technology of the result from a call to DUNDiLookup()
 ${DUNDDEST}	* The Destination of the result from a call to DUNDiLookup()
 
+The DUNDi dialplan switch uses the following variables
+---------------------------------------------------------
+${DUNDIDIALARGS}   Settings this variable allows you to provide options to be
+                   passed to the Dial application for calls being placed using
+		   the DUNDi switch.
+
 The Zaptel channel sets the following variables:
 ---------------------------------------------------------
 ${ANI2}			* The ANI2 Code provided by the network on the incoming call. 

pbx/pbx_dundi.c

@@ -4276,6 +4276,7 @@ static int dundi_exec(struct ast_channel *chan, const char *context, const char
 	int res;
 	int x=0;
 	char req[1024];
+	const char *dundiargs;
 	struct ast_app *dial;
 	
 	if (!strncasecmp(context, "macro-", 6)) {
@@ -4313,7 +4314,9 @@ static int dundi_exec(struct ast_channel *chan, const char *context, const char
 	}
 	if (x < res) {
 		/* Got a hit! */
-		snprintf(req, sizeof(req), "%s/%s", results[x].tech, results[x].dest);
+		dundiargs = pbx_builtin_getvar_helper(chan, "DUNDIDIALARGS");
+		snprintf(req, sizeof(req), "%s/%s||%s", results[x].tech, results[x].dest, 
+			S_OR(dundiargs, ""));
 		dial = pbx_findapp("Dial");
 		if (dial)
 			res = pbx_exec(chan, dial, req);