Release v1.9.0 on 2023-09-12.

1. fde19ed logging: Introduce DLBSSGP logging constant by Harald Welte · 3 years, 7 months ago
2. 607275c gb: drop special vty exit commands, use vty_install_default() by Neels Hofmeyr · 7 years ago
3. 17518fe doxygen: unify use of \file across the board by Neels Hofmeyr · 7 years ago
4. 812ba6d logging: centrally define ctx and filter indexes by Neels Hofmeyr · 7 years ago
5. 641f7ce libosmogb: move files to proper location and fix build by Harald Welte · 12 years ago 0.5.0[Renamed from openbsc/src/libgb/common_vty.h]
6. f543036 libgb: prefix all NS related functions with gprs_ by Harald Welte · 12 years ago
7. cca4963 libgb: Remove dependency to openbsc/debug.h by Harald Welte · 12 years ago
8. 4f5883b libgb: remove dependencies to openbsc/vty.h and openbsc/gsm_data.h by Harald Welte · 12 years ago