Initial version of c->reply_bytes implementation backported from unstable to 2.4, in order to apply issue 327 patches.

src/redis.h

@@ -339,6 +339,7 @@ typedef struct redisClient {
     int multibulklen;       /* number of multi bulk arguments left to read */
     long bulklen;           /* length of bulk argument in multi bulk request */
     list *reply;
+    unsigned long reply_bytes; /* Tot bytes of objects in reply list */
     int sentlen;
     time_t lastinteraction; /* time of the last interaction, used for timeout */
     int flags;              /* REDIS_SLAVE | REDIS_MONITOR | REDIS_MULTI ... */