# < data-end
# < files-end
#
-# > want signed-changes-dsc
-# < data-block NBYTES [transfer of signed changes]
-# [etc]
+# > want signed-dsc-changes
# < data-block NBYTES [transfer of signed dsc]
# [etc]
+# < data-block NBYTES [transfer of signed changes]
+# [etc]
# < files-end
#
# > complete