I noticed for quite some time that the hourly cron archiving creates an error "Allowed memory size exhausted in ... DataTable.php". I upped the memory_limit in php.ini and it was gone for a while, but now it is back and I do not want to ever increase the memory_limit as this also affects web applications then.
Can we have an option that takes in an optional path to a php.ini, so php could be run with an argument? I've now added the following to my archive.sh, but this will get overwritten with the next update.

if test -z $PHP_BIN; then
  echo "php binary not found. Make sure php5 or php exists in PATH." >&2
  exit 1
else
    PHP_BIN="$PHP_BIN -c /etc/php.local/piwik/php.ini"
fi