cygwin process after waiting 2 tenths of a second for it to terminate.
(forcekill): Add an extra argument determining whether to wait for the process
to exit.
(forcekill): New function.
* ps.cc (main): Add '-W' option to list Windows pids as well as Cygwin pids.
(dummyprocessmodules): New function.
(GetModuleFileNameEx95): New function.
(init_win): New function.
(to_time_t): New function.