We should never read more from the wrapped bucket than requested; thus, we should never need to hold leftovers. Remove the iovec stuff to hold unread data.
We should never read more from the wrapped bucket than requested;
thus, we should never need to hold leftovers. Remove the iovec stuff
to hold unread data.

* buckets/copy_buckets.c:
  (struct copy_context_t): remove VECS and VECS_COUNT
  (serf_bucket_copy_create): skip init of VECS_COUNT
  (serf_copy_read, serf_copy_readline, serf_copy_read_iovec,
      serf_copy_read_for_sendfile, serf_copy_read_bucket,
      serf_copy_peek): remove draft code to deal with VECS(_COUNT)

wzugang/serf,Manouchehri/serf,krime/serf,Manouchehri/serf,krime/serf,TommyU/serf,TommyU/serf,liuzongquan/serf,krime/serf,justinweb/serf,blueszhangsh/serf,sworda/serf,Manouchehri/serf,blueszhangsh/serf,wzugang/serf,sworda/serf,idomon/serf,muthusuba/serf,justinweb/serf,liuzongquan/serf,blueszhangsh/serf,liuzongquan/serf,idomon/serf,TommyU/serf,muthusuba/serf,justinweb/serf,justinweb/serf,idomon/serf,wzugang/serf,sworda/serf,blueszhangsh/serf,Manouchehri/serf,idomon/serf,sworda/serf,wzugang/serf,TommyU/serf,liuzongquan/serf,muthusuba/serf,muthusuba/serf,krime/serf