Add test for handling IIS 'extended' status codes (like 401.1) by response buckets.
Add test for handling IIS 'extended' status codes (like 401.1) by response
buckets.

* test/test_buckets.c
  (test_response_bucket_iis_status_code): New test.
  (test_buckets): Add test_response_bucket_iis_status_code to test list.
zhupan/serf,x-clone/serf,yesoce/serf,zhengcq315/serf,alex1818/serf,x-clone/serf,stoneCC/serf,yesoce/serf,zhengcq315/serf,lazysoez/serf,zhengcq315/serf,google-code-export/serf,soufianeEL/serf,x-clone/serf,KyleSanderson/serf,soufianeEL/serf,SirJson/serf,stoneCC/serf,soufianeEL/serf,alex1818/serf,google-code-export/serf,pengdu/serf,stoneCC/serf,yesoce/serf,google-code-export/serf,pengdu/serf,alex1818/serf,zhupan/serf,KyleSanderson/serf,stoneCC/serf,alex1818/serf,zhengcq315/serf,x-clone/serf,lazysoez/serf,yesoce/serf,google-code-export/serf,soufianeEL/serf,KyleSanderson/serf,SirJson/serf,pengdu/serf,pengdu/serf,SirJson/serf,lazysoez/serf,SirJson/serf,KyleSanderson/serf,zhupan/serf,zhupan/serf,lazysoez/serf