- Copy stable/10@296371 to releng/10.3 in preparation for 10.3-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.3.
- Update default pkg(8) configuration to use the quarterly branch.

Approved by: re (implicit)

MFC of r280785, r280871, r280872, r281510, r218511 - callout fixes.
Sponsored by: Netflix Inc.

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

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

Add memmove() to the kernel, making the kernel compile with Clang.

When copying big structures, LLVM generates calls to memmove(), because
it may not be able to figure out whether structures overlap. This caused
linker errors to occur. memmove() is now implemented using bcopy().
Ideally it would be the other way around, but that can be solved in the
future. On ARM we don't do add anything, because it already has
memmove().

Discussed on: arch@
Reviewed by: rdivacky

Replace the array initialization using the gcc-specific format
[constant] value
with the C99 format
[constant] = value

/* -> /*- for license, minor formatting changes

Mechanically rename s/ng_timeout/ng_callout/g, s/ng_untimeout/ng_uncallout/g.
This is done to keep both versions in RELENG_5 and support both APIs.

Reviewed by: scottl
Approved by: julian (mentor), implicitly

Adapt to the new ng_timeout/ng_untimeout arguments. These now use
the callout instead of the timeout interface.

Submitted by: glebius

Convert Netgraph to use mbuf tags to pass its meta information around.
Thanks to Sam for importing tags in a way that allowed this to be done.

Submitted by: Gleb Smirnoff <glebius@cell.sick.ru>
Also allow the sr and ar drivers to create netgraph versions of their modules.
Document the change to the ksocket node.

The layer 3 (signalling) of NgATM netgraph node: ng_uni. This node
handles user and network side signaling and partly PNNI.