Release v0.2.4 on 2021-09-06.

1. 3dcdd20 add missing copyright / license headers everywhere by Harald Welte · 5 years ago
2. 648f4e3 slotmap: Introduce slotmap_{rd,wr,un}lock() wrappers for lock debugging by Harald Welte · 5 years ago
3. 4b676bc slotmap: Log file/line when changing state by Harald Welte · 5 years ago
4. 294298c slotmap: Add _slotmap_del() for callers that already have a lock by Harald Welte · 5 years ago
5. c865683 slotmap: Add slotmap_get_id() function to get numeric ID of slot map by Harald Welte · 5 years ago
6. 2bf39e0 slotmap: Add "DELETE_REQ" state by Harald Welte · 5 years ago
7. f4e7504 slotmap: Return newly-created map from slotmap_add() by Harald Welte · 5 years ago
8. 91a0a4a slotmap: Introduce the concept of a slotmap state by Harald Welte · 5 years ago
9. faef8f0 slotmap: Introduce slotmap-printing function and use it by Harald Welte · 5 years ago
10. cbd1896 generalize slotmap to make use of it outside of bankd by Harald Welte · 5 years ago