Environment Variables: no longer processed

Missed the clear_env variable in the FPM documentation, processing environment variables is now no longer required.

PHP: unlocked patch version, now at 5.6.15

Merge pull request #75 from bryanlatten/php5.6.15

PHP: unlocking patch version

Bugfix: supports running without any CFG_-prefixed variables

Merge pull request #72 from cfortier2/feature/migration-script

Update to handle no `CFG_` variables

Persistence: removed from mysql/mysqli

Merge pull request #74 from bryanlatten/persistent-removal

Dockerfile: php defaults happen at build time, removed persistence

Update Rollup

Includes mysqli reconnect update

Cache: reverting customizations to memcache(d) mods

Merge pull request #63 from bryanlatten/revert-cache

Cache: removed customizations

Nginx/FPM: config updates for performance and stability

Merge pull request #62 from bryanlatten/keepalive-fix

Nginx/FPM: conf tweaks for perf + stability

PHP-FPM: unified timeout with nginx, use TCP instead of unix socket

Merge pull request #61 from bryanlatten/fpm-timeout

PHP-FPM: unified timeouts across nginx/php-fpm, TCP use instead of unix socket

Nginx/FPM: config update idempotency

Also upped PHP version to 5.6.13

Header Buffers: allowing configurable sizes

Merge pull request #57 from jimdelois/feature-configurable-buffers

Configurable FastCGI/Proxy Buffers for Debug Mode