Make the minidle option actually exist as documented (issue #7159 reported by imran)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@28698 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_zap.c

@@ -10718,6 +10718,8 @@ static int setup_zap(int reload)
 						v->value, v->lineno);
 			} else if (!strcasecmp(v->name, "minunused")) {
 				minunused = atoi(v->value);
+			} else if (!strcasecmp(v->name, "minidle")) {
+				minidle = atoi(v->value); 
 			} else if (!strcasecmp(v->name, "idleext")) {
 				ast_copy_string(idleext, v->value, sizeof(idleext));
 			} else if (!strcasecmp(v->name, "idledial")) {