Log Message:
lang/php73: update to 7.3.18

Update php73 to 7.3.18 (PHP 7.3.18).

14 May 2020, PHP 7.3.18

- Core:
  . Fixed bug #78875 (Long filenames cause OOM and temp files are not cleaned).
    (CVE-2019-11048) (cmb)
  . Fixed bug #78876 (Long variables in multipart/form-data cause OOM and temp
    files are not cleaned). (CVE-2019-11048) (cmb)
  . Fixed bug #79434 (PHP 7.3 and PHP-7.4 crash with NULL-pointer dereference
    on !CS constant). (Nikita)
  . Fixed bug #79477 (casting object into array creates references). (Nikita)
  . Fixed bug #79470 (PHP incompatible with 3rd party file system on demand).
    (cmb)
  . Fixed bug #78784 (Unable to interact with files inside a VFS for Git
    repository). (cmb)

- DOM:
  . Fixed bug #78221 (DOMNode::normalize() doesn't remove empty text nodes).
    (cmb)

- FCGI:
  . Fixed bug #79491 (Search for .user.ini extends up to root dir). (cmb)

- MBString:
  . Fixed bug #79441 (Segfault in mb_chr() if internal encoding is unsupported).
    (Girgias)

- OpenSSL:
  . Fixed bug #79497 (stream_socket_client() throws an unknown error sometimes
    with <1s timeout). (Joe Cai)

- Phar:
  . Fix bug #79503 (Memory leak on duplicate metadata). (cmb)

- SimpleXML:
  . Fixed bug #79528 (Different object of the same xml between 7.4.5 and
    7.4.4). (cmb)

- Standard:
  . Fixed bug #79468 (SIGSEGV when closing stream handle with a stream filter
    appended). (dinosaur)