tar: tar xf foo.tar dir/dir did not extract all subdirs.
Added testsuite entry for this

diff --git a/testsuite/README b/testsuite/README
index 40439bf..377f20e 100644
--- a/testsuite/README
+++ b/testsuite/README
@@ -1,3 +1,6 @@
+Update: doesn't work as described. Try "make check" from parent dir...
+* * *
+
 To run the test suite, change to this directory and run "./runtest".  It will
 run all of the test cases, and list those with unexpected outcomes.  Adding the
 -v option will cause it to show expected outcomes as well.  To only run the test