Release v1.5.1 on 2021-02-24.

1. 80c8a1d libosmocore.pc.in: Append -lsctp to Libs.private by Pau Espin Pedrol · 4 years, 7 months ago
2. d12f698 logging: Introduce mutex API to manage log_target in multi-thread envs by Pau Espin Pedrol · 4 years, 8 months ago
3. f4b173c talloc: Untested change to unbreak build by Holger Hans Peter Freyther · 8 years ago
4. a10ef29 use system-wide libtalloc with --enable-system-talloc by Harald Welte · 9 years ago
5. 3cae039 add missing automake / autoconf files by Harald Welte · 14 years ago