bsd.own.mk: rename GCC_NO_* to CC_WNO_*

Rename compiler-warning-disable variables from
GCC_NO_warning
to
CC_WNO_warning
where warning is the full warning name as used by the compiler.

GCC_NO_IMPL

bsd.own.mk: rename GCC_NO_* to CC_WNO_*

Rename compiler-warning-disable variables from
GCC_NO_warning
to
CC_WNO_warning
where warning is the full warning name as used by the compiler.

GCC_NO_IMPLICIT_FALLTHRU is CC_WNO_IMPLICIT_FALLTHROUGH

Using the convention CC_compilerflag, where compilerflag
is based on the full compiler flag name.

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introduce some common variables for use in GCC warning disables:

GCC_NO_FORMAT_TRUNCATION -Wno-format-truncation (GCC 7/8)
GCC_NO_STRINGOP_TRUNCATION -Wno-stringop-truncation (GCC 8)
GCC_NO_STRI

introduce some common variables for use in GCC warning disables:

GCC_NO_FORMAT_TRUNCATION -Wno-format-truncation (GCC 7/8)
GCC_NO_STRINGOP_TRUNCATION -Wno-stringop-truncation (GCC 8)
GCC_NO_STRINGOP_OVERFLOW -Wno-stringop-overflow (GCC 8)
GCC_NO_CAST_FUNCTION_TYPE -Wno-cast-function-type (GCC 8)

use these to turn off warnings for most GCC-8 complaints. many
of these are false positives, most of the real bugs are already
commited, or are yet to come.


we plan to introduce versions of (some?) of these that use the
"-Wno-error=" form, which still displays the warnings but does
not make it an error, and all of the above will be re-considered
as either being "fix me" (warning still displayed) or "warning
is wrong."

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Define _KERNTYPES for things that need it.

Remove remaining kvm glue.

New io statistics

use bsd.own.mk instead of the (obvious typo of) bsd.obj.mk

Use ${NETBSDSRCDIR}/some/path instead of ${.CURDIR}/../../some/path

the PMAP_NEW option is gone as the new interface is no longer optional.

completely remove Mach VM support. all that is left is the all the
header files as UVM still uses (most of) these.

add -DPMAP_NEW if PMAP_NEW is on in mk.conf

add -DUVM to CPPFLAGS if defined(UVM)

use CPPFLAGS instead of CFLAGS

merge lite-2 Makefiles (rcsids), and turn on WARNS for all of libexec.

WARNS?=1. RCS ids.

Fix reporting of disk statistics that's been broken since new disk
framework went in. From Jarle Greipsland <jarle@runit.sintef.no>, PR #3200.

RCS id police.

Install manpage as foo(8) as well as rpc.foo(8), a convenient shorthand.
Also make sure that foo and rpc.foo are mentioned in the NAME section.

specify man pages the new way.

no longer need lib hackery

hack to make getloadavg() link properly

Add RCS identifiers, remove some completely useless RCS logs and patchkit
headers, and a few other insignificant changes.

Updated man page.

No need to link with -lrpc

Add rpc.rstatd, rpc.rusersd, and rpc.rwalld.