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.

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