libsa: Remove redundant sys/cdefs.h

Sponsored by: Netflix

Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

zalloc_malloc:Free hexdump preceeding buffer when we detect overflow

Move hexdump from stand/common/misc.c to stand/libsa/hexdump.c
(svn cp)
Disable use of pager - causes linking issue for boot1
can

zalloc_malloc:Free hexdump preceeding buffer when we detect overflow

Move hexdump from stand/common/misc.c to stand/libsa/hexdump.c
(svn cp)
Disable use of pager - causes linking issue for boot1
can be re-enabled by defining HEXDUMP_PAGER.

Reviewed by: stevek, imp
MFC after: 1 week
Sponsored by: Juniper Networks
Differential Revision: https://reviews.freebsd.org/D26235

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Merge ^/head r352436 through r352536.

loader: revert r352421

As insisted by kib, malloc(0) is quite legal.

loader: add memalign() to libsa

Implement memalign(size_t alignment, size_t size) to allocate aligned memory.

loader: cstyle cleanup libsa zalloc sources

Clean up libstand zalloc* sources. Note that it is not 100% whitespace cleanup.
I also reduced block in znalloc and zfree as those were obvious simplifica

loader: cstyle cleanup libsa zalloc sources

Clean up libstand zalloc* sources. Note that it is not 100% whitespace cleanup.
I also reduced block in znalloc and zfree as those were obvious simplifications
and did help to save one level of indent.

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loader: factor out guard location setup from Realloc

To simplify and make it easier to read, use ga_Bytes field from guard
structure.

Merge ^/head r352319 through r352435.

loader: Malloc(0) should return NULL.

We really should not allocate anything with size 0.

Merge ^/head r325663 through r325841.

Move sys/boot to stand. Fix all references to new location

Sponsored by: Netflix