cwd to datadir if it's defined, rather than /

this way people can get cores if they want to


svn:r1171

src/or/main.c

@@ -672,7 +672,7 @@ int tor_main(int argc, char *argv[]) {
 #endif
 
   if (options.RunAsDaemon) {
-    start_daemon();
+    start_daemon(options.DataDirectory);
   }
 
   if(options.ORPort) { /* only spawn dns handlers if we're a router */