-be refused by your rsync server. When an option is refused the server
-prints an error message and exits.
+be refused by your rsync server. The full names of the options must be
+used (i.e., you must use "checksum" not "c" to disable checksumming).
+When an option is refused, the server prints an error message and exits.
+To prevent all compression, you can use "dont compress = *" (see below)
+instead of "refuse options = compress" to avoid returning an error to a
+client that requests compression.
+
+dit(bf(dont compress)) The "dont compress" option allows you to select
+filenames based on wildcard patterns that should not be compressed
+during transfer. Compression is expensive in terms of CPU usage so it
+is usually good to not try to compress files that won't compress well,
+such as already compressed files.
+
+The "dont compress" option takes a space separated list of
+case-insensitive wildcard patterns. Any source filename matching one
+of the patterns will not be compressed during transfer.