+ * Some variable-type cleanup that makes the code more consistent.
+ (Wayne Davison)
+
+ * Reduced memory requirements of hard link preservation.
+ (J.W. Schultz)
+
+ * Implemented a new algorithm for hard-link handling that speeds
+ up the code significantly. (J.W. Schultz and Wayne Davison)
+
+ * Got rid of support for protocol versions 17 and 18 (which are
+ both over 6 years old). (Wayne Davison)
+
+ * More optimal data transmission for --hard-links (protocol 28).
+
+ * More optimal data transmission for --checksum (protocol 28).
+
+ * Less memory used for holding --checksum data.
+
+ * Less memory used per-file in the file list.
+