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.

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."

branches: 1.15.26;
config() in manconf.c now verifies _build (and _crunch) command
templates with fmtcheck(3) so annotate the printf that uses these
commands as safe with a __format_arg wrapper and drop
-Wno-format-nonliteral.

XXX: Using local wrapper for now, solving this in general would be
nice, but it raises namespace pollution issues.

XXX^2: catman(8) also uses manconf.c and uses _build and _crunch so it
can also benefit from this (but see above).

Use -Wno-format-nonliteral instead of blanket -Wno-format.

use -Wno-format and revert "fixstring"

WARNS=6
- fix cast qual issues
- don't use snprintf on a user-provided buffer

branches: 1.11.6; 1.11.12; 1.11.16;
Enable WARNS=4 by default for usr.bin, except for:
awk bdes checknr compile_et error gss hxtool kgetcred kinit
klist ldd less lex locale login m4 man menuc mk_cmds
mklocale msgc openssl rpcgen rpcinfo sdiff spell ssh
string2key telnet tn3270 verify_krb5_conf xlint

branches: 1.10.14;
Convert to using raise_default_signal(3).

branches: 1.9.8;
WFORMAT is no more...

Rename man/config.{c,h} to man/manconf.{c,h}, so we don't have to
worry about problems including "config.h" when building as a host
tool.

branches: 1.7.2;
More format string cleanup by sommerfeld.

branches: 1.6.8; 1.6.16;
Sync with 4.4BSD-Lite2

specify man pages the new way.

add man(1) ; part of new man(1) package from Bostic

Add RCS indentifiers.

Add makewhatis script

branches: 1.1.1;
Initial revision