Release v0.2.4 on 2021-09-06.

1. 2513d81 bankd: move bank_id / num_slots from g_bankd to remsim_srv_conn by Harald Welte · 5 years ago
2. a844bb0 Introduce {server,bankd}_conn_send_rspro() by Harald Welte · 5 years ago
3. 3cded63 naming: Distinguish "rspro client" from "remsim client" by Harald Welte · 5 years ago[Renamed (94%) from src/remsim_client_fsm.h]
4. 707c85a Split "RSPRO client FSM" from "BANKD client FSM" by Harald Welte · 5 years ago