Merge r204430 from head to stable/8:

Merge r204430 from head to stable/8:

  Remove stale comment about socket buffer accounting from access(2) code.
  It is the case, however, that the uidinfo of the temporary credential
  set up for access(2) is not properly updated when its effective uid is
  changed.

Approved by:	re (bz)

git-svn-id: svn://svn.freebsd.org/base/stable/8@208694 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f