Retire the unimplemented MAP_RENAME and MAP_NORESERVE flags to mmap(2).
Older binaries are still permitted to use these flags.

PR:		193961 (exp-run in ports)
Differential Revision:	https://reviews.freebsd.org/D848
Reviewed by:	kib
Add an elf not so kgdb detects the kernel as a FreeBSD elf file. The
ELFNOTE macro is based on one from the FreeBSD/ARM Xen tree [1].

Obtained from:	Julien Grall <julien.grall AT linaro.org> [1]
Add support for new USB 3G device.

Submitted by:	gabor@zahemszky.hu
MFC after:	1 week
* Zero rule buffer.
* Rename 'read' variable.

Pointed by:	luigi