Merge r204810 from head to stable/8:

Merge r204810 from head to stable/8:

  Remove unnecessary locking of divcbinfo lock from div_output(): this has
  not been required since FreeBSD 7.0 when the so_pcb pointer leading to inp
  was guaranteed to be stable when a valid socket reference is held (as it
  is in the output path).

  Reviewed by:	bz
  Sponsored by:	Juniper Networks

Approved by:	re (kib)

git-svn-id: svn://svn.freebsd.org/base/stable/8@208766 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f