ntp: Vendor import of ntp-4.2.8p18MFC: 3 daysMerge commit '1f833b3fc9968c3dd7ed79ccf0525ebf16c891ad' into main
ntp: import ntp-4.2.8p17Fixes two small bugs including one regression.MFC after: 3 daysMerge commit 'ab1f1aa8333369a83ff284848fc3fc2e52d5f29f'