Small refactoring.
Small refactoring.

* outgoing.c
  (create_request): New function, constructor for a serf_request_t object.
  (serf_connection_request_create,
   serf_connection_priority_request_create): Move request creation to the 
       new function.

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