Version 2.2.0

Version 2.2.0

Changes:

• Adds support for new Duo certificate authorities
• Fixes multiple memory leaks
• Updates the Duo authentication algorithm to use SHA512 signatures
• Updates various third-party libraries
• Avoids using environment variables in the http proxy handling
• Fixes a bug that incorrectly parsed devices
• Adds IPv6 support
• Includes a User Agent in HTTP API calls