Log Message:
lang/php71: update to 7.1.20

19 Jul 2018, PHP 7.1.20

- Core:
  . Fixed bug #76534 (PHP hangs on 'illegal string offset on string references
    with an error handler). (Laruence)
  . Fixed bug #76502 (Chain of mixed exceptions and errors does not serialize
    properly). (Nikita)

- Date:
  . Fixed bug #76462 (Undefined property: DateInterval::$f). (Anatol)

- exif:
  . Fixed bug #76423 (Int Overflow lead to Heap OverFlow in
    exif_thumbnail_extract of exif.c). (Stas)
 . Fixed bug #76557 (heap-buffer-overflow (READ of size 48) while reading exif
    data). (Stas)

- FPM:
  . Fixed bug #73342 (Vulnerability in php-fpm by changing stdin to
    non-blocking). (Nikita)

- GMP:
  . Fixed bug #74670 (Integer Underflow when unserializing GMP and possible
    other classes). (Nikita)

- intl:
  . Fixed bug #76556 (get_debug_info handler for BreakIterator shows wrong
    type). (cmb)

- mbstring:
  . Fixed bug #76532 (Integer overflow and excessive memory usage
    in mb_strimwidth). (MarcusSchwarz)

- PGSQL:
  . Fixed bug #76548 (pg_fetch_result did not fetch the next row). (Anatol)

- phpdbg:
  . Fix arginfo wrt. optional/required parameters. (cmb)

- Reflection:
  . Fixed bug #76536 (PHP crashes with core dump when throwing exception in
    error handler). (Laruence)
  . Fixed bug #75231 (ReflectionProperty#getValue() incorrectly works with
    inherited classes). (Nikita)

- Standard:
  . Fixed bug #76505 (array_merge_recursive() is duplicating sub-array keys).
    (Laruence)
  . Fixed bug #71848 (getimagesize with $imageinfo returns false). (cmb)

- Win32:
  . Fixed bug #76459 (windows linkinfo lacks openbasedir check). (Anatol)