tests: add a comment explaining the potential failure

diff --git a/tests/mkdir/selinux b/tests/mkdir/selinux
index adbaa6a..4363275 100755 (executable)
--- a/tests/mkdir/selinux
+++ b/tests/mkdir/selinux
@@ -23,6 +23,10 @@ if test "$VERBOSE" = yes; then
   mknod --version
 fi
 
+# Note: on an SELinux/enforcing system running mcstransd older than
+# mcstrans-0.2.8-1.fc9, the following commands may mistakenly exit
+# successfully, in spite of the invalid context string.
+
 . $srcdir/../envvar-check
 . $srcdir/../lang-default
 . $srcdir/../test-lib.sh