Comment 4 for bug 256380

I ACKed bug 257880, but still there are some open questions:
 - This change was dropped, isn't it necessary any more? If so, why?
  * debian/rules: undef _FORTIFY_SOURCE so that it doesn't fail about ignored
    chdir() return value.
 - as far as I can tell this patch did not get upstream yet, why can it be dropped?
  * debian/patches: Add fix_includes_and_printf_usage.dpatch
    - #include <limits.h> in {main,ignore_pool}.c to get PATH_MAX and INT_MAX
    - local.c: Fix insecure printf usage