counters: 2nd parameter of cnt.get rpc is now optional

If the counter name is missing cnt.get will display the whole
group (equivalent to cnt.grp_get_all).
E.g.:
$ sercmd cnt.get tcp
{
	con_reset: 0
	con_timeout: 0
	connect_failed: 0
	connect_success: 0
	current_opened_connections: 0
	current_write_queue_size: 0
	established: 0
	local_reject: 0
	passive_open: 0
	send_timeout: 0
	sendq_full: 0
}

$ sercmd cnt.get tcp current_opened_connections
0

modules/counters/counters.c

@@ -273,6 +273,10 @@ static int cnt_reset_f(struct sip_msg* msg, char* handle, char* bar)
 
 
 
+static void cnt_grp_get_all(rpc_t* rpc, void* c, char* group);
+
+
+
 static void cnt_get_rpc(rpc_t* rpc, void* c)
 {
 	char* group;
@@ -280,10 +284,11 @@ static void cnt_get_rpc(rpc_t* rpc, void* c)
 	counter_val_t v;
 	counter_handle_t h;
 	
-	if (rpc->scan(c, "ss", &group, &name) < 2) {
-		/* rpc->fault(c, 400, "group and counter name required"); */
+	if (rpc->scan(c, "s", &group) < 1)
 		return;
-	}
+	if (rpc->scan(c, "*s", &name) < 1)
+		return cnt_grp_get_all(rpc, c, group);
+	/* group & name read */
 	if (counter_lookup(&h, group, name) < 0) {
 		rpc->fault(c, 400, "non-existent counter %s.%s\n", group, name);
 		return;
@@ -400,16 +405,11 @@ static void cnt_var_list_rpc(rpc_t* rpc, void* c)
 
 
 
-static void cnt_grp_get_all_rpc(rpc_t* rpc, void* c)
+static void cnt_grp_get_all(rpc_t* rpc, void* c, char* group)
 {
 	void* s;
-	char* group;
 	struct rpc_list_params packed_params;
 	
-	if (rpc->scan(c, "s", &group) < 1) {
-		/* rpc->fault(c, 400, "group name required"); */
-		return;
-	}
 	if (rpc->add(c, "{", &s) < 0) return;
 	packed_params.rpc = rpc;
 	packed_params.ctx = s;
@@ -418,6 +418,19 @@ static void cnt_grp_get_all_rpc(rpc_t* rpc, void* c)
 
 
 
+static void cnt_grp_get_all_rpc(rpc_t* rpc, void* c)
+{
+	char* group;
+	
+	if (rpc->scan(c, "s", &group) < 1) {
+		/* rpc->fault(c, 400, "group name required"); */
+		return;
+	}
+	return cnt_grp_get_all(rpc, c, group);
+}
+
+
+
 static void cnt_help_rpc(rpc_t* rpc, void* ctx)
 {
 	char* group;