added (passing) tests for using lua numbers in response header names and values for the ngx.header.HEADER API.
added (passing) tests for using lua numbers in response header names and values for the ngx.header.HEADER API.

yeahdongcn/SEnginx,yeahdongcn/SEnginx,yeahdongcn/SEnginx,yeahdongcn/SEnginx,yeahdongcn/SEnginx,yeahdongcn/SEnginx,yeahdongcn/SEnginx