Add the heartbeat logic feature.

Fu Juntang

2021-09-17 5c912c70e9333298ff48f7ea15424f72ca977b99

 include/usgcommon/usg_common.h

@@ -101,7 +101,7 @@
/**
 * @ seperator 分割符
 */
char * str_join( const char *seperator, const char *first...);
char * str_join( const char *seperator, const char *first, ...);
/**
 * 把字符串以@delim分割为数组，数组的地址存放在@arr_addr
 */