[bt6703]increase SEND_BUF_MAX_LEN

modules/HTTP_Server/my_ssl_server.h

@@ -21,7 +21,7 @@
 #define SSL_TASK_PRIO   ( configMAX_PRIORITIES - 3 )
 #define FRAME_SIZE      (1000)
 
-#define SEND_BUF_MAX_LEN      2000
+#define SEND_BUF_MAX_LEN      4000
 #define RECIVE_BUF_MAX_LEN    1500
 
 typedef enum