Use standard daemon() call on Linux to daemonize the process

include/dcdbdaemon.h

@@ -33,6 +33,9 @@
 
 static int dcdbdaemon()
 {
+#ifdef __linux__
+  daemon(0, 0);
+#else
   switch(fork()) {
   case -1:
     return -1;
@@ -45,6 +48,7 @@ static int dcdbdaemon()
 
   if (setsid() == -1)
     return -1;
+#endif
 
   return 0;
 }