Fix log_line_prefix to display the transaction id (%x) for statements not in a transaction block

When Who What
2024-05-18 10:05:13 Zongliang Quan (quanzl) Closed in commitfest 2024-07 with status: Withdrawn
2024-05-15 16:58:44 Robert Haas (rhaas) New status: Waiting on Author
2024-04-09 06:15:11 Andrey Borodin (x4m) Closed in commitfest 2024-03 with status: Moved to next CF
2024-03-14 02:37:11 Zongliang Quan (quanzl) New status: Needs review
2024-03-04 07:54:18 Andrey Borodin (x4m) New status: Waiting on Author
2024-03-04 07:46:56 jian he (universality) Added universality as reviewer
2024-02-01 17:23:44 vigneshwaran C (vignesh.postgres) Closed in commitfest 2024-01 with status: Moved to next CF
2023-12-12 08:29:12 Zongliang Quan (quanzl) Changed targetversion to 17
2023-12-04 09:06:33 John Naylor (john.naylor) Closed in commitfest 2023-11 with status: Moved to next CF
2023-10-08 04:50:22 Zongliang Quan (quanzl) Changed authors to Zongliang Quan (quanzl)
2023-10-08 04:50:22 Zongliang Quan (quanzl) Changed targetversion to stable
2023-10-08 04:49:49 Zongliang Quan (quanzl) Attached mail thread 12fa0c9a-2189-ed7a-016a-3f1b99bd756c@yeah.net
2023-10-08 04:49:49 Zongliang Quan (quanzl) Created patch record