(service_stoppped,stop_service,loc_Ctrl_C_Handler,

empth_request_shutdown,loc_BlockMainThread,empth_init,
service_ctrl_handler) [_WIN32]: Remove the Windows Build UI and
replace with Ctrl-c signal trap.  The shutdown event that was used for
STOPPING the service is now used for both foreground and background
(service) modes of operation. Also move the shutdown event from service
code to empth_t library.

include/empthread.h

@@ -105,6 +105,7 @@ typedef struct {
 typedef struct loc_Thread_t empth_t;
 typedef struct loc_Sem_t empth_sem_t;
 
+void empth_request_shutdown(void);
 #endif
 
 int empth_init(char **ctx, int flags);