+ &do_compression, /* 8 (protocol 29) */
+ &tweaked_iconv, /* 9 (protocol 30) */
+ &preserve_acls, /* 10 (protocol 30) */
+ &preserve_xattrs, /* 11 (protocol 30) */
+ &inplace, /* 12 (protocol 30) */
+ &tweaked_append, /* 13 (protocol 30) */
+ &tweaked_append_verify, /* 14 (protocol 30) */