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."

Install the sample slip.login to share/examples/slip/slip.login

branches: 1.6.14; 1.6.16;
Add USE_FORT support.

WARNSify

merge lite-2

specify man pages the new way.

Add RCS identifiers.

branches: 1.1.1;
Initial revision

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

Patches provided by Joel Baker in PR 22366, verified by myself.

merge lite-2

move config files into /etc/sliphome, and note that and other changes in docs

Add RCS identifiers.

branches: 1.1.1;
Initial revision

fix NetBSD RCS id tags

RCSID police

merge lite-2

fix, and make examples better.

branches: 1.1.1;
Initial revision

merge lite-2

do the right thing with positional parameters

deal with change in setting of slip params

branches: 1.1.1;
Initial revision

Sort sections. New sentence, new line.

FILES section from Dan Plassche

branches: 1.9.94; 1.9.96;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22366, verified by myself.

Use standard headers.

Add section to a .Xr.

branches: 1.6.12;
WARNSify

merge lite-2

Reference the new sl(4) page

move config files into /etc/sliphome, and note that and other changes in docs

Add RCS indentifiers.

branches: 1.1.1;
Initial revision

fix unused variable warnings.

branches: 1.23.2; 1.23.8;
static + ANSIfy + __dead

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

branches: 1.21.26;
Add (unsigned char) cast to ctype functions

Don't compare an int to NULL.

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

Patches provided by Joel Baker in PR 22366, verified by myself.

strncpy -> strlcpy to ensure string termination

skip past / if we found one in argv[0]

KNF + check for fork failure.

Check length of given user name to (slip)login. Fixed the exploit in
http://www.rootshell.com/archive-Rbf4ahcmxzw5qn2S/199801/sliplogin.c.

WARNSify

merge lite-2

be safe with buffers.

sys/termios.h -> termios.h

pull in signal.h, rather than sys/signal.h

more cleanup -- names instead of numbers, err/warn

DTRT on one error exit -- more necessary, much more...

get SLIOCGUNIT from the right place

deal with change in setting of slip params

Eliminate a compiler warning.

Use sys_signame[].

Add RCS identifiers.

Correct checking of setsid() return value (from bvs@bitblocks.com).

branches: 1.1.1;
Initial revision