• Add : The new constant VMG_COMPAT_CODE_COPY_CLONE evaluates to true
  if your perl calls 'copy' magic when a magical code prototype
  is cloned, which is currently the case for perl 5.17.0 and
  above.
  
• Fix : [RT #90205] : copy magic on subs puts raw CV in $[3]
  $[3] will now contain a reference to the cloned code when
  'copy' magic is called for a coderef.
  Thanks Lukas Mai for reporting.
  
• Fix : t/35-stash.t has been taught about perl 5.21.4.
  
• Fix : Tests using run_perl() in t/17-ctl.t will no longer fail on
  Android.