Segfaults with latest sources

Following updating to a release built from sources about 201603140356Z,
a few userland programs have started failing with Segmentation fault.
This is on my Lemote Yeeloong netbook.

Immediately noticable was "security/sudo".  Invoking anything via 'sudo'
would fail with "Memory fault".

Upon rebooting, '/sbin/mount_tmpfs' failed with Segmentation fault
attempting to mount "/var/shm".  Then '/usr/sbin/ntpd' failed with
Segmentation fault during its startup attempt.  The resulting core files
were claimed by 'gdb' to not be valid core files, so no debugging
information is available.

It so-far appears that 'sudo' will work if authentication is required.
Thereafter, during the grace period set by "timestamp_timeout", it will
fail with "Memory fault".

Rebuilding "security/sudo" did not resolve its problem.

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