Add a timeout option to wintty. This allows the user to specify a number

of seconds to wait after the program terminates before closing the window.
Previously, the windows would remain open indefinately.  This option is
not currently being used by Apache.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@95836 13f79535-47bb-0310-9956-ffa450edef68