sysctl: OID number(131) is already in use for 'me'

[Arseny Nasokin]

I've recently upgrade my machine to FreeBSD-Current revision 297059 and got
strange result on first boot lines:

sysctl: OID number(131) is already in use for 'me'

I build system in two stages: first with 'native'/crosstools clang, second
in bhyve. This message appears in both times.

I've tried to boot latest FreeBSD-10 and I've seen no such message.

My kernel config is here:
https://bitbucket.org/eirnym/bsd/src/7f7e4a234b5bba4b346fd76e5f8b35d58d2bec29/eroese/EirZen.amd64

-- Eir Nym