checked in the tests for the bug regarding connection timeout error checking fixed in the previous commit.
checked in the tests for the bug regarding connection timeout error checking fixed in the previous commit.

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