+File attributes
+
+ Device major/minor numbers should be at least 32 bits each. See
+ http://lists.samba.org/pipermail/rsync/2001-November/005357.html
+
+ Transfer ACLs. Need to think of a standard representation.
+ Probably better not to even try to convert between NT and POSIX.
+ Possibly can share some code with Samba.
+
+Empty directories
+
+ With the current common --include '*/' --exclude '*' pattern, people
+ can end up with many empty directories. We might avoid this by
+ lazily creating such directories.
+
+zlib
+
+ Perhaps don't use our own zlib. Will we actually be incompatible,
+ or just be slightly less efficient?
+
+logging
+
+ Perhaps flush stdout after each filename, so that people trying to
+ monitor progress in a log file can do so more easily. See
+ http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=48108