修复回放、停止预览bug，增加ZLM hook监听，长时间无人观看，停止摄像头推流。需开启ZLM的hook并配置url

songww

2020-05-14 805fa42a2c010d92b1c8fc29a60d32fd99fb4ea3

 src/main/java/com/genersoft/iot/vmp/gb28181/utils/DateUtil.java

@@ -46,7 +46,7 @@
      Date date;

      try {

         date = format.parse(formatTime);

         Long timestamp=date.getTime();

         Long timestamp=date.getTime()/1000;

         //转换为Date类

         return timestamp;

      } catch (ParseException e) {