simplified code
drop dead/unused code
Improved ASSIGN_<OP>, ASSIGN_DIM and UNSET_DIM
Wrap RETURN_VALUE_USED() with EXPECTED() or UNEXPECTED() macros according to more frequent usage patterns.
Improved basic zval copying primitives: ZVAL_COPY_VALUE(), ZVAL_COPY(), ZVAL_DUP()
Fix bug #68526 Implement POSIX Access Control List for UDS

- add --with-fpm-acl build option which allow to manage ACL
on Unix Domain Socket
- add listen.acl_users pool option
- add listen.acl_groups pool option

Keep old behavior (chmod) if option not used or not supported.
NEWS
Merge branch 'PHP-5.6'

* PHP-5.6:
  NEWS
  Fix bug #68526 Implement POSIX Access Control List for UDS
Updated NEWS