Tighten pledge in List and Append mode:

Tighten pledge in List and Append mode:

Drop "wpath cpath fattr dpath" in read-only:
-  cpio -i -t < test.tar
-  pax < test.tar
-  tar -t -f test.tar

Drop "cpath fattr dpath" in read-write:
-  echo foo | cpio -o -A -H ustar -O test.tar
-  tar -r -f test.tar foo
-  pax -w -a -f test.tar foo

Other modes remain unchanged and thus can create or modify files.

Feedback OK millert