Merge branch 'PHP-5.6.18' into PHP-7.0.3

Merge branch 'PHP-5.6.18' into PHP-7.0.3

* PHP-5.6.18:
  fix tests
  fix NEWS
  Update NEWS
  update NEWS
  Fixed bug #71488: Stack overflow when decompressing tar archives
  update NEWS
  add missing headers for SIZE_MAX
  backport the escapeshell* functions hardening branch
  add tests
  Fix bug #71459 - Integer overflow in iptcembed()
  prepare 5.6.18RC1
  Fix test when run with openssl < 1.0.2 (reorder so no more SSLv2 message) Fix skip message to work
  improve fix for bug #71201
  Fixed bug #71323 - Output of stream_get_meta_data can be falsified by its input
  Fix bug #71391: NULL Pointer Dereference in phar_tar_setupmetadata()
  Fixed bug #71331 - Uninitialized pointer in phar_make_dirstream()
  Fix bug #71335: Type Confusion in WDDX Packet Deserialization
  Fix bug #71354 - remove UMR when size is 0

Conflicts:
	configure.in
	ext/phar/dirstream.c
	ext/phar/phar_object.c
	ext/phar/tar.c
	ext/standard/exec.c
	ext/standard/iptc.c
	ext/standard/math.c
	ext/standard/streamsfuncs.c
	ext/wddx/wddx.c
	main/php_version.h
	main/streams/memory.c