wild fits inside 32 elements, like UsmUserEntry objects.
OK rob@, claudio@

so move our BER API to the unused ober_* prefix to avoid some
breakage in ports.
Problem diagnosed by jmatthew with ber_free() in samba, but
there are many others as pointed out by sthen.
tests & ok rob
ok sthen (who had an almost identical diff for libutil)
"go head hit it" deraadt

ok jmc@, schwarze@

Discussed with and ok jmc@, schwarze@, claudio@