PHP: Use aggressive disable_functions defaults which can be further tuned per FPM pool.
PHP: Sync settings with factory defaults.
PHP: Always build from sources + remove support for deprecated APC and Memcached.

This step is required before we can introduce multi-version modern PHP support.
Nginx 1.5.8
PHP: Conversion to multi-version setup (step 2)
PHP: Restore MailParse support - 2.1.6
Make it crystal clear that Ubuntu is barely supported, rarely tested and thus not recommended.
Ubercart 3.6.0
Ubercart 2.13.0
Commerce 1.21
Commerce 2.10
Commons 2.14.0
Open Atrium 2.12
Open Outreach 1.3
OpenChurch 1.11-b15
PHP: Conversion to multi-version setup (step 3)
Issue #2159881 by stred, Hasse - Drush is broken because required Console_Table download URL no longer works.
PHP: Conversion to multi-version setup (step 4)
Percona 5.5.35
Disable tcp_slow_start_after_idle for better SPDY performance.

See also: http://www.chromium.org/spdy/spdy-best-practices