1.添加Redis分布式锁接口，代码宏控制启动（目前非启用）

（存在问题1.由于redis异步，锁存在内容较高，加锁后影响性能较严重
          2.不是每次锁都能成功）
2.添加显示接口中，openssl生成证书时间信息输出（生成证书总时间/生成证书次数）

src/cert_session.h

@@ -12,22 +12,6 @@
 #include "MESA_list_queue.h"
 #include "rt_sync.h"
 
-enum conn_states {
-    conn_listening,  /**< the socket which listens for connections */
-    conn_new_cmd,    /**< Prepare connection for next command */
-    conn_waiting,    /**< waiting for a readable socket */
-    conn_read,       /**< reading in a command line */
-    conn_parse_cmd,  /**< try to parse a command from the input buffer */
-    conn_write,      /**< writing out a simple response */
-    conn_nread,      /**< reading in a fixed number of bytes */
-    conn_swallow,    /**< swallowing unnecessary bytes w/o storing */
-    conn_closing,    /**< closing this connection */
-    conn_mwrite,     /**< writing out many items sequentially */
-    conn_closed,     /**< connection is closed */
-    conn_watch,      /**< held by the logger thread as a watcher */
-    conn_max_state   /**< Max state value (used for assertion) */
-};
-
 typedef struct {
     int  id;
 
@@ -43,11 +27,16 @@ typedef struct {
 
     struct redisAsyncContext *cl_ctx;
 
+    struct redisContext *sync;
+
     void * (*routine)(void *);  /** Executive entry */
 
     int field_ids;    /* dispaly */
 
     int column_ids;
+
+    uint64_t diffTime;
+
 } libevent_thread;
 
 extern int cert_session_init();