Revert "ntp: work around recent ntpd crashes"
Revert "ntp: work around recent ntpd crashes"

This reverts commit a193049d5236c5914fa8858a9f56a537996ddbaa.
Was solved in FreeBSD kernel...

opnsense/core,opnsense/core,opnsense/core,opnsense/core,opnsense/core,opnsense/core