MFC r260125:
  Bump copyright year.
  Happy New Year 2014!

Sponsored by:	The FreeBSD Foundation
MFC r259872:

 The compile time constant limit on number of swap devices was removed in 5.2.
 As such, remove the EINVAL error saying so.  Currently the vm.nswapdev sysctl
 just represents the number of added swap devices.
MFC r260016:

Remove superfluous old-style rcsid[] from if_sk.c.  There is already an
__FBSDID() at the top of the file.
MFC Broadcom 10Gb bxe driver
Merged r255736, r255861, r256299, r256341, r258187, r259928, r260113

Approved by:  davidch (mentor)
MFC r260038:

In sys/dev/en/midway.c, #if 0 an unused static function.
MFC r260040:

In sys/dev/mcd/mcd.c, mark the static const COPYRIGHT string as __used,
so it ends up in the object file, and no warnings are emitted about it
being actually unused.
MFC r260042:

Remove superfluous old-style rcsid[] from if_my.c.  There is already an
__FBSDID() at the top of the file.
MFC r260048:

In sys/netgraph/netflow, use __FBSDID() instead of old-style rcs_id[].
MFC r260054:

In sys/dev/tpm/tpm.c, #if 0 an unused static function.
MFC r260055:

In sys/dev/usb/wlan/if_urtw.c, #if 0 a static const variable, which has
been unused since r198194.
MFC r260057:

In sys/dev/scc, remove unused static function scc_setmreg().  While
here, invoke scc_getmreg() in two more places where it can be used.

Reviewed by:	marcel
MFC r260103:

In sys/amd64/amd64/pmap.c, remove static function pmap_is_current(),
which has been unused since r189415.

Reviewed by:	alc
MFC r260095:

For sys/boot/i386 and sys/boot/pc98, separate flags to be passed
directly to the linker (LD_FLAGS) from flags passed indirectly, via the
compiler driver (LDFLAGS).

This is because several Makefiles under sys/boot/i386 and sys/boot/pc98
use ${LD} directly to link, and the normal LDFLAGS value should not be
used in these cases.
MFC r260112:

In sys/dev/sound/pci/maestro.c, #if 0 two unused static functions.
MFC r235128:
Add missing LibUSB 1.0 API function: libusb_get_string_descriptor().