pg_ctl/miscinit: print "MyStartTime" as a long long instead of long to avoid 2038 problem

When Who What
2024-10-07 18:55:19 Nathan Bossart (bossartn) Closed in commitfest 2024-11 with status: Committed
2024-09-26 20:21:09 Nathan Bossart (bossartn) New status: Ready for Committer
2024-09-26 01:11:16 Nathan Bossart (bossartn) Changed authors to Nathan Bossart (bossartn)
2024-09-26 01:11:16 Nathan Bossart (bossartn) Changed committer to bossartn
2024-09-26 01:11:16 Nathan Bossart (bossartn) Changed targetversion to 18
2024-09-26 01:10:57 Nathan Bossart (bossartn) Attached mail thread CO1PR07MB905262E8AC270FAAACED66008D682@CO1PR07MB9052.namprd07.prod.outlook.com
2024-09-26 01:10:57 Nathan Bossart (bossartn) Created patch record