Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Per Regents of the University of Calfornia letter, remove advertising
clause.

# If I've done so improperly on a file, please let me know.

Merge some fixes from NetBSD's getopt.c v1.26:
cleanups, handling 'ls -l-', handling '--*'

Note this is in the same time back out of our v1.3
"Don't print an error message if the bad option is '?'"
because it directly violates POSIX.

Do not use __progname directly (except in [gs]etprogname(3)).
Also, make an internal _getprogname() that is used only inside
libc. For libc, getprogname(3) is a weak symbol in case a
function of the same name is defined in userland.

Fix the style of the SCM ID's.
I believe have made all of libc .c's as consistent as possible.

If the string specifying the allowed options starts with a leading `:',
`getopt(3)' should not print a warning for missing argument values.

PR: bin/29625
Reviewed by: mikeh
MFC after: 1 week

Don't print an error message if the bad option is '?'. This has been
in my tree for a long time. bde reviewed this once upon a time and
said it was OK, iirc. This also obviates the need to put ? in the
optstring argument to preclude the extra warning message which some
people think confuses users. When I made my getopt cleanups of a long
time ago, this was the compromise reached. I just neglected to commit
it until now.

Fix handling of trailing :'s to match what other OSes do (spit out
a diagnostis).

Submitted by: Guy Harris <gharris@flashcom.net>

This commit was generated by cvs2svn to compensate for changes in r23658,
which included commits to RCS files with non-trunk default branches.

Import CSRG 4.4BSD-Lite2 lib/libc onto vendor branch

BSD 4.4 Lite Lib Sources