Make pg_waldump and xact_desc() report the detail information like GID about PREPARE TRANSACTION record

When Who What
2019-11-13 08:38:27 Fujii Masao (masaofujii) Closed in commitfest 2019-11 with status: Committed
2019-11-13 08:38:18 Fujii Masao (masaofujii) Added masaofujii as committer
2019-11-11 07:26:43 Michael Paquier (michael-kun) New status: Ready for Committer
2019-11-08 00:41:23 Michael Paquier (michael-kun) New status: Waiting on Author
2019-09-30 18:53:44 Álvaro Herrera (alvherre) Closed in commitfest 2019-09 with status: Moved to next CF
2019-09-03 12:46:46 Fujii Masao (masaofujii) New status: Needs review
2019-08-01 11:55:58 Thomas Munro (macdice) New status: Waiting on Author
2019-08-01 11:55:40 Thomas Munro (macdice) Closed in commitfest 2019-07 with status: Moved to next CF
2019-08-01 11:00:35 Thomas Munro (macdice) New status: Needs review
2019-07-02 10:16:16 Julien Rouhaud (rjuju) New status: Waiting on Author
2019-06-27 15:36:12 Julien Rouhaud (rjuju) Added rjuju as reviewer
2019-04-25 15:38:55 Fujii Masao (masaofujii) Changed authors to Fujii Masao (masaofujii)
2019-04-25 15:38:21 Fujii Masao (masaofujii) Attached mail thread CAHGQGwEvhASad4JJnCv=0dW2TJypZgW_Vpb-oZik2a3utCqcrA@mail.gmail.com
2019-04-25 15:38:21 Fujii Masao (masaofujii) Created patch record