* Lower DNS timeout to 20 seconds

src/adns.c

@@ -177,7 +177,7 @@ static const char *dns_next_server();
 static int parse_reply(char *response, size_t nbytes, const char* server_ip, bool blocking = 0);
 
 interval_t async_lookup_timeout = 10;
-interval_t async_server_timeout = 40;
+interval_t async_server_timeout = 20;
 //int resend_on_read = 0;
 
 static void