PHPki Digital Certificate Authority

Version 0.83 is primarily a bug fix release with a couple of added minor features.

- Converted deprecated HTTP_SERVER_VARS to _SERVER
- Fixed emailcodesigning error in openssl_functions.php
- Fixed failure to create httpasswd file in secure.sh
- Fixed false positives when detecting if requested email certificate already exists
- Added support for 4 character TLD in email address
- Added support for short term certificates (1,3,6 months)