Set 403 status when forbidding access to exports
Added RFC 4408 support (SPF via type 99)
Updated records_update.sql - the val column needs to be much bigger (changing to 512) for SPF records
Updated UPGRADE file to reflect this
Moved version into its own file
Removed specific version from update-data.sh, doesn't make sense to maintain it here
* Added CIDR suport for $trusted_hosts
* Moved $trusted into src/config.php so you can easily set to 1 if you want
  to limit via web server instead
Updated SUPPORT links in README
Prepped 0.11.3 release