Introduce RWSpin lock and use it in sinvaladt.c and xlogrecovery.c

When Who What
2025-09-08 11:07:42 Yura Sokolov (funny_falcon) Moved from CF PG19-1 to CF PG19-3
2025-06-03 09:26:57 Yura Sokolov (funny_falcon) Changed name to Introduce RWSpin lock and use it in sinvaladt.c and xlogrecovery.c
2025-04-30 13:24:00 Yura Sokolov (funny_falcon) Closed in commitfest 2025-03 with status: Moved to next CF
2025-02-12 18:21:23 Yura Sokolov (funny_falcon) Changed authors to Yura Sokolov (funny_falcon)
2025-02-12 18:21:23 Yura Sokolov (funny_falcon) Changed targetversion to 18
2025-02-12 18:20:45 Yura Sokolov (funny_falcon) Attached mail thread 30aa0030-f694-44ef-a19d-6ef7ddb69374@postgrespro.ru
2025-02-12 18:20:45 Yura Sokolov (funny_falcon) Created patch record