libpq - improve PQexec documentation

When Who What
2019-08-01 09:11:18 Thomas Munro (macdice) Closed in commitfest 2019-07 with status: Returned with feedback
2019-07-05 06:47:43 Peter Eisentraut (petere) New status: Waiting on Author
2019-07-01 08:15:04 Xianming Dou (xianming.dxm) Removed xianming.dxm from reviewers
2019-07-01 08:14:42 Xianming Dou (xianming.dxm) Added xianming.dxm as reviewer
2019-06-12 11:59:07 Peter Eisentraut (petere) Added petere as reviewer
2019-04-12 08:39:46 Fabien Coelho (calvin) Changed authors to Fabien Coelho (calvin)
2019-04-12 08:39:35 Fabien Coelho (calvin) Attached mail thread alpine.DEB.2.21.1904121016310.8912@lancre
2019-04-12 08:39:35 Fabien Coelho (calvin) Created patch record