v91 date

Double values for several OPcache ini settings:

- memory_consumption
- interned_strings_buffer
- max_accelerated_files

fix HHVM builds failing when trying to install New Relic or Blackfire…

… extensions

better error message if composer.lock is garbage

prevent generation of illegal empty metapak repo

manifest and some cleanup for ext-blackfire

fix PHP 7 notice for HHVM only builds

warn about PHP 7

CHANGELOG date

downgrade Apache HTTPD to version 2.4.16

Regression in REDIRECT_URL: https://bz.apache.org/bugzilla/show_bug.cgi?id=57785