Don't make assert use stdio; saves >100K on an empty static binary.

Update old-style definitions to ANSI, remove a couple of register
definitions along the way. Fixed gcc 4.1 build (thank you vax)

A little libc namespace housekeeping exercise:
* Make vfprintf_unlocked() an internal function, c.f. __svfscanf_unlocked().
* Add internal names for arc4random(), endnetpath(), fhstatvfs(),
fstatvf

A little libc namespace housekeeping exercise:
* Make vfprintf_unlocked() an internal function, c.f. __svfscanf_unlocked().
* Add internal names for arc4random(), endnetpath(), fhstatvfs(),
fstatvfs(), mkstemp(), shquote(), statvfs(), taddr2uaddr(), uaddr2taddr(),
uuid_create_nil(), uuid_is_nil(), and wcwidth().
* Include namespace.h where supposed to.

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

Patches provided by Joel Baker in PR 22280, verified by myself.

nuke a last-minute addition in the getprogname() cleanup that didn't work.

convert from __progname to getprogname()

* Change __diagassert13() so that by default it only syslogs the error (it
used to syslog and also send to stderr).

This behaviour can be changed by setting $LIBC_DIAGASSERT to a
string contai

* Change __diagassert13() so that by default it only syslogs the error (it
used to syslog and also send to stderr).

This behaviour can be changed by setting $LIBC_DIAGASSERT to a
string containing one or more of the following letters:
a abort() after syslog and/or print to stderr
A opposite of a
e print assertion message to stderr
E opposite of e
l log assertion message to syslog
L opposite of l

This allows per-process control of the _DIAGASSERT() behaviour (e.g,
if you want to abort() after the assertion is raised) by modifying the
environment before starting the process.

Note that __DIAGASSERT() is still a no-op unless libc is compiled
with -D_DIAGNOSTIC.

* Implement __assert()/__diagassert() by calling __assert13()/__diagassert13()
with a function of NULL, reducing unnecessary code duplication

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fix missing formatting escape.

C99: Print the name of the function enclosing the assertion, if possible.

unnest nested extern declaration.

implement __diagassert(). currently this just prints the assertion to
stderr and syslog()s to user.debug. (it does not abort).

XXX: implement a scheme similar to $MALLOC_OPTIONS which gives the
user

implement __diagassert(). currently this just prints the assertion to
stderr and syslog()s to user.debug. (it does not abort).

XXX: implement a scheme similar to $MALLOC_OPTIONS which gives the
user control over whether to stderr, syslog, abort, do nothing, etc...

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Fix RCSID's

clean up Id's on files previously imported...

new assert helper

Fix spelling error in Copyright notice

Declare rcsid strings so they are stored in text segment.

Add even more RCS frobs.

Make assert macro ansi complient.