+As a result of the first item, the streams from rsync's version of
+zlib are *not compatible* with those produced by the upstream version
+of rsync. In other words, if you link rsync against your system's
+copy, it will not be able to interoperate with any other version if
+the -z option is used. (Sorry. Sometimes standard is better than
+better.)
+
+The rsync maintainers hope to fix this problem in the future by either
+merging our changes into the upstream version, or backing them out of
+rsync in a way that preserves wire compatibility. But in the meantime
+this version must be maintained in parallel.
+