ifdefs added to use kevent on Free Open and Net BSD as well. INFO and ae.c modified in order to report the multiplexing API in use

ae_select.c

@@ -72,3 +72,7 @@ static int aeApiPoll(aeEventLoop *eventLoop, struct timeval *tvp) {
     }
     return numevents;
 }
+
+static char *aeApiName(void) {
+    return "select";
+}