Release v1.5.2 on 2021-09-24.

1. 8d82780 timer: Document osmo_gettimeofday API by Pau Espin Pedrol · 6 years ago
2. 87fade8 timer: Introduce osmo_clock_gettime to override clock_gettime by Pau Espin Pedrol · 6 years ago
3. e08da97 Fix/Update copyright notices; Add SPDX annotation by Harald Welte · 7 years ago
4. 1fa8dfb Expand osmo_gettimeofday() docs by Max · 7 years ago
5. 17518fe doxygen: unify use of \file across the board by Neels Hofmeyr · 7 years ago
6. 87e4550 doxygen: enable AUTOBRIEF, drop \brief by Neels Hofmeyr · 7 years ago
7. 648f878 timer_gettimeofday.c: Fix implicit use of timeradd by Pau Espin Pedrol · 7 years ago
8. 8e2f7e8 add osmo_gettimeofday as a shim around gettimeofday by Neels Hofmeyr · 8 years ago