new interfaces for timers; the implementation is not changed yet

src/config.hpp

@@ -69,9 +69,13 @@ namespace zmq
         //  Maximum number of events the I/O thread can process in one go.
         max_io_events = 256,
 
+//  TODO: To be removed
         //  Maximal wait time for a timer (milliseconds).
         max_timer_period = 100,
 
+        //  How long to wait (milliseconds) till reattempting to connect.
+        reconnect_period = 100,
+
         //  Maximal delay to process command in API thread (in CPU ticks).
         //  3,000,000 ticks equals to 1 - 2 milliseconds on current CPUs.
         //  Note that delay is only applied when there is continuous stream of