Merge branch 'master' of git.php.net:/php-src

* 'master' of git.php.net:/php-src: (37 commits)
  Avoid conditions inside loop
  Improve loop vectorization
  Improve loop vectorization
  Remove unused function
  Fixed bug #75938
  Remove unused files
  Fixed bug #75940 Unnecessary compile wrapper with PHP_THREAD_SAFETY=yes
  typo
  Update README.GIT-RULES
  Fix SKIPIF section
  Fixes bug #75871 Use pkg-config for libxml2 if available
  Fixed bug #49876 lib path on 64bit distros
  Refactor testing READMEs
  Fixed bug #65414
  Fixed bug #65414
  Fixed bug #74519 strange behavior of AppendIterator
  fix #74519 strange behavior of AppendIterator
  Use bool instead of boolean
  Remove space between function name and open parentheses
  Fix some misspellings
  ...

diff --cc acinclude.m4
Simple merge

diff --cc configure.ac
Simple merge

diff --cc ext/standard/string.c
Simple merge