git: ab1f1aa83333..1f833b3fc996 - vendor/ntp - vendor branch updated

From: Cy Schubert <cy_at_FreeBSD.org>
Date: Mon, 27 May 2024 01:43:04 UTC
The branch vendor/ntp has been updated by cy:

URL: https://cgit.FreeBSD.org/src/log/?id=ab1f1aa83333..1f833b3fc996

1f833b3fc996 ntp: Vendor import of ntp-4.2.8p18