Add a comment regarding the file header, and the mode that the file is created

with.

This should be fixed shortly by adding the (desirable) option to set the file
creation mode on the command line.

tools/regression/usr.bin/uuencode/regress.sh

@@ -7,6 +7,11 @@ if [ -z "$TESTDIR" ]; then
 fi
 cd $TESTDIR
 
+# Note that currently the uuencode(1) program provides no facility to
+# include the file mode explicitly based on an argument passed to it,
+# so the regress.in file must be mode 644, or the test will say that,
+# incorrectly, regression has occurred based on the header.
+
 for test in traditional base64; do
   echo "Running test $test"
   case "$test" in