+ /* FIXME: This can be confusing when the error message
+ * is coming from a remote server which has an older
+ * rsync version than the local version. The user
+ * sees the option documented in the local --help, but
+ * then the program seems to refuse to execute it. So
+ * perhaps the message should give the hostname or
+ * something.
+ *
+ * In rsync 3.x, it might be nice if options which
+ * only affect one end didn't have to bother the
+ * remote end. */