For requests wrapped by a barrier bucket, serf will create a new chunk for each child bucket of the aggregate body bucket. This results in chunk of one or a few bytes.
For requests wrapped by a barrier bucket, serf will create a new chunk for
each child bucket of the aggregate body bucket. This results in chunk of
one or a few bytes.

* buckets/barrier_buckets.c:
  (serf_barrier_read_iovec): New function, forward call to wrapped bucket.
  (serf_bucket_type_barrier): Use serf_barrier_read_iovec.


SirJson/serf,stoneCC/serf,KyleSanderson/serf,pengdu/serf,alex1818/serf,zhupan/serf,x-clone/serf,soufianeEL/serf,yesoce/serf,zhengcq315/serf,zhengcq315/serf,zhengcq315/serf,KyleSanderson/serf,pengdu/serf,zhengcq315/serf,zhupan/serf,lazysoez/serf,zhupan/serf,alex1818/serf,x-clone/serf,lazysoez/serf,lazysoez/serf,x-clone/serf,pengdu/serf,yesoce/serf,KyleSanderson/serf,alex1818/serf,pengdu/serf,stoneCC/serf,zhupan/serf,google-code-export/serf,soufianeEL/serf,alex1818/serf,soufianeEL/serf,KyleSanderson/serf,lazysoez/serf,google-code-export/serf,SirJson/serf,SirJson/serf,yesoce/serf,soufianeEL/serf,stoneCC/serf,stoneCC/serf,google-code-export/serf,google-code-export/serf,yesoce/serf,x-clone/serf,SirJson/serf