make MaxBackends available in _PG_init

2022-05-13 15:35:04 Nathan Bossart (bossartn) Closed in commitfest 2022-07 with status: Committed 2022-05-13 15:35:04 Nathan Bossart (bossartn) Changed committer to rhaas 2022-05-08 11:57:11 alex lan (alex-xxx) Added alex-xxx as reviewer 2022-04-29 09:36:17 Anton Melnikov (antonmel) Added antonmel as reviewer 2022-04-11 19:21:48 Nathan Bossart (bossartn) Changed authors to Nathan Bossart (bossartn) 2022-04-11 19:21:48 Nathan Bossart (bossartn) Changed targetversion to 15 2022-04-11 19:21:31 Nathan Bossart (bossartn) Attached mail thread 4f20d57b2aeb447b8eb1495319940c5f@G08CNEXMBPEKD06.g08.fujitsu.local 2022-04-11 19:21:31 Nathan Bossart (bossartn) Created patch record