Merge pre-4-2-20-invasive. Summary of changes:

* Acquire resources before daemonizing, fail in foreground
* Initialize threads and signals after daemonizing
* Make most file names relative to data directory
* emp_server and files make it their working directory
* emp_config() no longer screws up some file names
* Missing or incorrect econfig is now fatal
* Don't log to default log file when econfig changes it

src/lib/empthread/ntthread.c

@@ -472,7 +472,7 @@ empth_exit(void)
     if (pThread->bMainThread) {
 	/* The main line.  Wait forever. */
 	while (1) {
-	    if (!debug) {
+	    if (daemonize) {
 		if (service_stopped())
 		    shutdwn(0);
 		Sleep(3);