Merge branch 'PHP-7.0' into PHP-7.1

* PHP-7.0:
  Fixed bug #73418 Integer Overflow in "_php_imap_mail" leads to crash
  Fixed bug #73418 Integer Overflow in "_php_imap_mail" leads to crash
  Fix #72696: imagefilltoborder stackoverflow on truecolor images
  Fix #72482: Ilegal write/read access caused by gdImageAALine overflow
  Fix bug #73144 and bug #73341 - remove extra dtor
  remove unreferenced var came in with merge
  Fix bug #73331 - do not try to serialize/unserialize objects wddx can not handle
  Fix #72696: imagefilltoborder stackoverflow on truecolor images
  Fix #72482: Ilegal write/read access caused by gdImageAALine overflow
  fix version
  set versions
  Fix bug #73144 and bug #73341 - remove extra dtor
  Fix bug #73331 - do not try to serialize/unserialize objects wddx can not handle

diff --cc ext/imap/php_imap.c
Simple merge

diff --cc ext/pdo/pdo_stmt.c
Simple merge

diff --cc ext/wddx/wddx.c
Simple merge