PHP/5.5.15
fix newrelic logfile settings (wrong comment delimiter)
read new relic log level from NEW_RELIC_LOG_LEVEL env var
no longer need to check for mod_rewrite on boot
with 2.4.10 out, no need to check for mod_proxy_handler anymore
use custom fd (3) instead of stdout (1) for detecting child process termination
make sure all subprocess exits are caught properly
some more inline comments on process control
suppress first pkill error output too in case processes are gone already; makes 'heroku logs' output a bit less cluttered and confusing on shutdown
HHVM/3.2.0
fix pkill usage output suppression (when no jobs -p results) on Linux
fix libsasl plugin and config paths used at runtime for cedar-14
allow requiring ext-zend-opcache (that's its name) in composer.json
parsing extension names from the .ini if it's there is necessary for that
fix new relic log output during compile
lowercase ext names from composer.json
refactor newrelic and zend-opcache install routines
disable newrelic earlier during builds to prevent pushes from hanging in certain rare cases
fix HHVM builds failing due to non-existant directory
HHVM (3.2.0+) for cedar-14
warn on strict version selectors