This patch from Sami Farin lets you specify --fsync if you want fsync()
to be called on every file we write.
---- orig/options.c 2005-05-03 16:47:32
+--- orig/options.c 2005-05-10 15:32:58
+++ options.c 2005-01-28 19:30:47
@@ -39,6 +39,7 @@ int make_backups = 0;
**/