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: 1.10.46;
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: 1.9.20;
Add new Makefile knob, USE_FORT, which extends USE_SSP by turning on the
FORTIFY_SOURCE feature of libssp, thus checking the size of arguments to
various string and memory copy and set functions (as well as a few system
calls and other miscellany) where known at function entry. RedHat has
evidently built all "core system packages" with this option for some time.

This option should be used at the top of Makefiles (or Makefile.inc where
this is used for subdirectories) but after any setting of LIB.

This is only useful for userland code, and cannot be used in libc or in
any code which includes the libc internals, because it overrides certain
libc functions with macros. Some effort has been made to make USE_FORT=yes
work correctly for a full-system build by having the bsd.sys.mk logic
disable the feature where it should not be used (libc, libssp iteself,
the kernel) but no attempt has been made to build the entire system with
USE_FORT and doing so will doubtless expose numerous bugs and misfeatures.

Adjust the system build so that all programs and libraries that are setuid,
directly handle network data (including serial comm data), perform
authentication, or appear likely to have (or have a history of having)
data-driven bugs (e.g. file(1)) are built with USE_FORT=yes by default,
with the exception of libc, which cannot use USE_FORT and thus uses
only USE_SSP by default. Tested on i386 with no ill results; USE_FORT=no
per-directory or in a system build will disable if desired.

- Minor logical restructure. Make sure we can create the client before
even bothering to call makemsg(); (Liam Foy)
- Use MAXPATHLEN consistently (Liam Foy)
- WARNS=3, KNF and misc cleanups

RCS ID police

specify man pages the new way.

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

Add man page.

No need to link with -lrpc

Add rup and rusers. Changes to rwall

rwall, mostly-original by cgd.
code snarfed from rwalld (from cgd), and wall (from UCB).

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22365, verified by myself.

New sentence, new line.

Punctuation nit.

Substitute the cross reference to portmap(8) with rpcbind(8).

branches: 1.8.10;
More and more .Os cleanups. .Os is defined in the tmac.doc-common file,
so we shouldn't override it with versions in the manpages. Many more to
come.

WARNSify, fix .Nm usage

RCS ID police

Fix spelling errors.

Add cross references to "SEE ALSO" section.

Change Sun-OS to SunOS. Every other instance of in manual our manual
is typeset that way.
Remove BUG about sorting options not being supported as rwall never had
sorting. Probably caused when manpage for rup or rusers was used as a
template.

Add RCS indentifiers.

Add man page.

Remove the \n and tabs from the __COPYRIGHT() strings.
Tweak to use a consistent format.

branches: 1.16.22;
- Minor logical restructure. Make sure we can create the client before
even bothering to call makemsg(); (Liam Foy)
- Use MAXPATHLEN consistently (Liam Foy)
- WARNS=3, KNF and misc cleanups

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22365, verified by myself.

Check return value of mkstemp correctly.

- Knf auto variables in modified line by me.
- Print "??" as tty name instead of print nothing. Suggested by jhawk.

- Check return value of ttyname(3) and prevent to pass NULL pointer for
"%s" in printf style format string.
- Use STDERR_FILENO as paramter for ttyname(3).

branches: 1.11.2;
fix up NetBSD RCS Ids to match the standard, and the leading comment as
to match as well. No functional changes.

branches: 1.10.8;
small cast.

const poisoning.

- use an array MAXHOSTNAMELEN+1 size to hold hostnames
- ensure hostname from gethostname() is nul-terminated in all cases
- minor KNF
- use MAXHOSTNAMELEN over various other values/defines
- be safe will buffers that hold hostnames

WARNSify, fix .Nm usage

RCS ID police

Must use a struct timeval, not NULL, for the timeout in clnt_call.
Include appropriate header files to bring prototypes into scope.
Enlarge buffer used for tempfile name -- were trying to stuff ~20
chars into a 15 char buffer.

Add RCS identifiers.

Add rup and rusers. Changes to rwall

Fix NULL pointer reference.

rwall, mostly-original by cgd.
code snarfed from rwalld (from cgd), and wall (from UCB).