Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

For sys/dev/ce/tau32-ddk.c, disable the following warning when building
with clang:

sys/dev/ce/tau32-ddk.c:1228:37: warning: implicit truncation from 'int' to bitfield changes value from 65532 to 8188 [-Wconstant-conversion]

Since this file is obfuscated C, we can never determine (in a sane way,
at least :) if this points to a real problem or not. The driver has
been in the tree for more than five years, so it most likely isn't.

MFC after: 1 week

Per email to arch@ a little while ago (that was greeted with silence),
prefer the more common > ${.TARGET} over > opt_foo.h in modules
makefiles.

NO_MAN is not needed here.

Fix the decaying MODULES_WITH_WORLD again by adding a missing opt_*.h to SRCS.

Add makefile for ce(4) module.