Allow connection level errors (such as connection refused) to propogate upwards properly.
Allow connection level errors (such as connection refused) to propogate upwards
properly.

* context.c
  (read_from_connection): Assume len is only initialized if status is SUCCESS.

zhengcq315/serf,SirJson/serf,x-clone/serf,zhupan/serf,soufianeEL/serf,soufianeEL/serf,krime/serf,SirJson/serf,x-clone/serf,blueszhangsh/serf,wzugang/serf,stoneCC/serf,SirJson/serf,idomon/serf,liuzongquan/serf,alex1818/serf,zhupan/serf,alex1818/serf,krime/serf,x-clone/serf,liuzongquan/serf,Manouchehri/serf,yesoce/serf,KyleSanderson/serf,alex1818/serf,KyleSanderson/serf,yesoce/serf,x-clone/serf,muthusuba/serf,justinweb/serf,lazysoez/serf,zhengcq315/serf,pengdu/serf,TommyU/serf,muthusuba/serf,sworda/serf,krime/serf,pengdu/serf,TommyU/serf,Manouchehri/serf,stoneCC/serf,soufianeEL/serf,alex1818/serf,stoneCC/serf,wzugang/serf,wzugang/serf,sworda/serf,Manouchehri/serf,Manouchehri/serf,blueszhangsh/serf,justinweb/serf,google-code-export/serf,liuzongquan/serf,blueszhangsh/serf,lazysoez/serf,idomon/serf,sworda/serf,KyleSanderson/serf,pengdu/serf,pengdu/serf,yesoce/serf,liuzongquan/serf,zhengcq315/serf,soufianeEL/serf,KyleSanderson/serf,wzugang/serf,muthusuba/serf,lazysoez/serf,TommyU/serf,justinweb/serf,idomon/serf,justinweb/serf,google-code-export/serf,idomon/serf,google-code-export/serf,blueszhangsh/serf,zhupan/serf,sworda/serf,SirJson/serf,stoneCC/serf,muthusuba/serf,TommyU/serf,google-code-export/serf,yesoce/serf,zhengcq315/serf,zhupan/serf,lazysoez/serf,krime/serf