sys: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/

Sponsored by: Netflix

sys: Remove $FreeBSD$: one-line .c pattern

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

- Prefer ACPI_COMPARE_NAME(a, b) macro over strncmp(a, b, ACPI_NAME_SIZE).
- Make sure the predefined name is a string type.
- Return slightly more useful errors.

Fix white spaces.

Use the preload_fetch_addr() and preload_fetch_size() convenience
functions to obtain the address and size of the overriding DSDT.

Sponsored by: Juniper Networks.

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

Import ACPICA 20090521.

Prefer predefined DSDT signature from header file.

Fix ACPI table override. Since ACPI CA 20090123, any ACPI table can be
overriden, not just DSDT. However, we do not support this feature yet.

Chase ACPICA API changes (for kernel and boot loader).

- Import the HEAD csup code which is the basis for the cvsmode work.

Catch up with ACPI-CA 20070320 import.

Catch up with ACPI-CA 20051021 import

Canonize the include of acpi.h.

Standardize __FBSDID identifiers.

MFC after: 2 days

When the user overrides the DSDT, replace any SSDTs with a simple no-op
table. acpidump(8) concatenates the body of the DSDT and SSDTs so an
edited ASL will contain all the necessary information. We can't use a
completely empty table since ACPI-CA reports this as a problem.

MFC after: 3 days

Style fixes.

Fix hw.acpi.os_name by renaming it to hw.acpi.osname. The "_name" suffix
is reserved by the loader, and thus any tunable name with that suffix will
be silently discarded.

Document this in the header and man page so that other developers do not
develop so many bumps on the head after banging it against the wall.

Detective work by: Mark Santcroos, grehan

Add TUNABLE_STR to make "hw.acpi.os_name" more correct. However, the call
to getenv_string() still doesn't work.

Expand the check for overriding the OS name to override _OS* (including
_OS_, _OS, and _OSI). This should fix this option for people who reported
it not changing anything.

Support functions for the new ACPI import.
* AcpiOsDerivePciId(): finds a bus number, given the slot/func and the
acpi parse tree.
* AcpiOsPredefinedOverride(): use the sysctl hw.acpi.os_name to
override the value for _OS.

Ideas from: takawata, jhb
Reviewed by: takawata, marcel
Tested on: i386, ia64

Resolve conflicts arising from the ACPI CA 20020725 import.

Resolve conflicts arising from the ACPI CA 20020611 import.