Botan2 is a BSD-licensed crypto library for C++. It provides
applications with the ability to use a number of cryptographic
algorithms, as well as SSL/TLS, X.509 certificates and CRLs, PKCS #10
certificate requests, a filter/pipe message processing system, and a
wide variety of other features.

Botan2 relies on Python3 for its compilation configuration.

To build TPM support, use `TPM=YES`. This option adds a dependency on
`system/trousers`.

Botan2 is made available for compatibility purposes only. The updated
Botan package should be used by preference.
