Fix three of these strings (ones that are rarely seen)

Remove more duplicate #includes, and a few spurious whitespaces at EOL
From Slava Semushin <slava.semushin@gmail.com>

compat core reorg.

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

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

Make some needed weak aliases.

Move warnings about sys_siglist[] and __sys_siglist to _sys_siglist.c,
so that the warning is shown once at link time, not three times.

Warn about references to the compatibility sys_siglist[], and direct the
user to include <signal.h> or <unistd.h> to generate the correct reference.

Warn about references to the deprecated __sys_sig

Warn about references to the compatibility sys_siglist[], and direct the
user to include <signal.h> or <unistd.h> to generate the correct reference.

Warn about references to the deprecated __sys_siglist[], and direct the
user to include <signal.h> or <unistd.h> and use sys_siglist instead.

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Don't include <sys/cdefs.h> twice. Also, don't include <signal.h> or
<unistd.h>. These headers are not needed, and if included now, cause
a compile error since the exported and renamed type is diff

Don't include <sys/cdefs.h> twice. Also, don't include <signal.h> or
<unistd.h>. These headers are not needed, and if included now, cause
a compile error since the exported and renamed type is different.

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Adapt to new signal changes (from Jason)

Fix RCSID's

fix up some RCS Id's i botched.

merge with 4.4-Lite, keeping local changes. clean up Ids

Rework indirect reference support as outlined by my recent message to
the tech-userlevel mailing list.

Renamed sys_errlist[] and sys_nerr to __sys_errlist[] and __sys_nerr.
The traditional API of sys_errlist[] and sys_nerr is provided by weak
references if they are supported. Otherwise, we're forced

Renamed sys_errlist[] and sys_nerr to __sys_errlist[] and __sys_nerr.
The traditional API of sys_errlist[] and sys_nerr is provided by weak
references if they are supported. Otherwise, we're forced to have to
have two copies of the error message string table in the library.
Fortunately, unless a program uses both sys_errlist[] and strerror(),
only one of the copies will be linked into the executable.

This is all to provide an clean namespace as required by ANSI. I've
done the same for sys_siglist[], even though it is not required, to
be consistant.

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Add `const's to sys_siglist and sys_signame decls.

Declare rcsid strings so they are stored in text segment.

Add even more RCS frobs.

initial import of 386bsd-0.1 sources