Fix detection of preadv/pwritev support for OSX.

2021-07-12 23:18:29 Tom Lane (tgl) Closed in commitfest 2021-07 with status: Committed 2021-07-12 23:18:29 Tom Lane (tgl) Changed committer to tgl 2021-06-22 21:10:33 Tobias Bussmann (t.bussmann) Attached mail thread 20210119111625.20435-1-james.hilliard1@gmail.com 2021-04-27 19:34:37 Cleysson Lima (cleyssonlima) Added cleyssonlima as reviewer 2021-04-08 15:38:32 David Steele (dsteele) Closed in commitfest 2021-03 with status: Moved to next CF 2021-03-29 23:56:25 Justin Pryzby (justinpryzby) New status: Ready for Committer 2021-03-29 17:50:23 James Hilliard (jameshilliard) Attached mail thread CADvTj4rXce=iaGfUMuA_ftVXMjMVk31cBGsVoS6zFF2orm1FWw@mail.gmail.com 2021-02-22 09:04:09 Peter Eisentraut (petere) Changed authors to James Hilliard (jameshilliard) 2021-02-06 03:21:52 James Hilliard (jameshilliard) Attached mail thread 20210122193230.25295-1-james.hilliard1@gmail.com 2021-02-06 03:21:52 James Hilliard (jameshilliard) Created patch record