added a long-running test cgi script.
added a long-running test cgi script.

used to test timed (&chunked) response content passing.

xzero/x0,xzero/x0,christianparpart/x0,christianparpart/x0,christianparpart/x0,christianparpart/x0,christianparpart/x0,xzero/x0,xzero/x0,christianparpart/x0,xzero/x0,xzero/x0,christianparpart/x0