Merge branch 'PHP-5.6' into PHP-7.0

Merge branch 'PHP-5.6' into PHP-7.0

* PHP-5.6:
  Clear FG(user_stream_current_filename) when bailing out
  Fix tests
  fix tsrm
  Fix bug #73284 - heap overflow in php_ereg_replace function
  Fix bug #73276 - crash in openssl_random_pseudo_bytes function
  Fix bug #73293 - NULL pointer dereference in SimpleXMLElement::asXML()
  fix bug #73275 - crash in openssl_encrypt function
  Fix for #73240 - Write out of bounds at number_format
  Bug #73218: add mitigation for ICU int overflow
  Add more locale length checks, due to ICU bugs.
  Fix bug #73208 - another missing length check
  Fix bug #73190: memcpy negative parameter _bc_new_num_ex
  Fix bug #73189 - Memcpy negative size parameter php_resolve_path
  Fixed bug #73174 - heap overflow in php_pcre_replace_impl
  Fix bug #73150: missing NULL check in dom_document_save_html
  Fix bug #73147: Use After Free in PHP7 unserialize()
  Fix bug #73082
  Fix bug #73073 - CachingIterator null dereference when convert to string