* pinfo.h (pinfo::status_exit): Rename from former static function in pinfo.cc.
(pinfo::operator == (char *)): Remove unused operator.
* pinfo.cc (pinfo::status_exit): Move this function info pinfo class.  Use
progname from the pinfo rather than myself.  Be defensive when inspecting
procinfo.
	* cygthread.cc (cygthread::terminate_thread): Only try to free
	thread stack on systems not freeing it by themselves.
	* wincap.h (wincaps::terminate_thread_frees_stack): New element.
	* wincap.cc: Implement above element throughout.