install/40520: Sysinst can't set root shell

[gson%gson.org@localhost (Andreas Gustafsson)]

>Number:         40520
>Category:       install
>Synopsis:       Sysinst can't set root shell
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    install-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jan 30 16:45:00 +0000 2009
>Originator:     Andreas Gustafsson
>Release:        NetBSD-current as of 2009.01.30.11.55.04
>Organization:
>Environment:
System: NetBSD
Architecture: i386
Machine: i386
>Description:

At the end of the NetBSD installation process, when setting the root
shell, sysinst reports:

  Status: Running
  Command: chpass -s /bin/sh root
  /etc/master.passwd: entry root inconsistent expire
  chpass: /etc/master.passwd: unchanged
  Command failed
  Hit enter to continue

I've run into this both in qemu and on physical hardware.  Probably
fallout from the time_t change.

>How-To-Repeat:

Build -current and attempt to install it.

>Fix: