php-bc.php
A list of additional PHP timezones that are returned by DateTimeZone::listIdentifiers(DateTimeZone::ALL_WITH_BC) valid for new DateTimeZone().
This list does not include those timezone identifiers that we have to map to a different identifier for some PHP versions (see php-workaround.php).
Instead of using DateTimeZone::listIdentifiers(DateTimeZone::ALL_WITH_BC) directly, we use this file because DateTimeZone::ALL_WITH_BC is not properly supported by all PHP version and HHVM.