Merge branch 'PHP-5.5' of git.php.net:php-src into PHP-5.5

# By Anatol Belski (38) and others
# Via Anatol Belski (23) and others
* 'PHP-5.5' of git.php.net:php-src: (325 commits)
  NEWS
  NEWS
  Fixed Bug #66820 out-of-bounds memory access in fileinfo
  Improves fix for memory leak, keep in sync with upstream.
  Fixed news for #60602
  Updated news for #60602
  proc_open(): separate environment values that aren't strings
  Fixed NEWS.
  Updated news for #66535 and #66109
  Updated NEWS for #66535
  don't compare constants on run time
  substr_compare(): Allow zero length comparison
  Fixed test case title
  [bug 66535] X-PHP-Originating-Script adds newline if no custom headers are given
  Fixed expected output of a few cURL test cases
  Allow NULL as value for CURLOPT_CUSTOMREQUEST option.
  man page: long option name is --strip, not --stripped
  --global have be removed in 5.2
  typo spotted by Lajos Veres
  update libs_version.txt
  ...