Switch the file test over to the new request header system.
Switch the file test over to the new request header system.

* test/serf_file.c:
  (main): get the headers bucket and set the appropriate values. also
    removed some #if'd out code and an unused variable.


git-svn-id: 683495cb1553624b05a54e2ba9533425f69cf277@205 61a7d7f5-40b7-0310-9c16-bb0ea8cb1845

coapp-packages/serf,coapp-packages/serf,coapp-packages/serf