bin/53015: dhcpd fails to start in -current

[prlw1%cam.ac.uk@localhost]

>Number:         53015
>Category:       bin
>Synopsis:       dhcpd fails to start in -current
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Feb 12 15:40:00 +0000 2018
>Originator:     Patrick Welche
>Release:        -current/amd64 of 10 Feb 2018
>Organization:
>Environment:
>Description:
As noted in

http://mail-index.netbsd.org/current-users/2018/02/10/msg033196.html

Just updated second computer to -current/amd64, this time of 12 Feb 2018.

Running dhcpd also gives

 Can't initialize context: failure

dhcpd.conf hasn't changed (different to the one on the other box).
>How-To-Repeat:
Update to -current
Run dhcpd
>Fix: