+ * Reduced memory requirements of hard link preservation.
+ (J.W. Schultz)
+
+ * Got rid of support for protocol versions 17 and 18 (which are
+ both over 6 years old).
+
+ * More optimal data transmission for --hard-links (protocol 28).
+
+ * More optimal data transmission for --checksum (protocol 28).
+
+ * Less memory used for holding --checksum data.
+