Release v1.9.0 on 2023-09-12.

1. e08da97 Fix/Update copyright notices; Add SPDX annotation by Harald Welte · 7 years ago
2. 17518fe doxygen: unify use of \file across the board by Neels Hofmeyr · 7 years ago
3. 12ba778 include: Switch to #pragma once pattern by Sylvain Munaut · 10 years ago
4. 042afe7 milenage: Add function to compute OPC from OP and K by Harald Welte · 12 years ago
5. 781bd5d Auth: Import milenage implementation from hostap (Jouni Malinen) by Harald Welte · 13 years ago