Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

- Rewrite radius servers traversal algorithm.
- Add functions for working with IPv6 attributes.

Approved by: ae

Add binding support to libradius(3).

Submitted by: Sergey Matveychuk <sem33@yandex-team.ru>
Approved by: ae (mentor)
MFC after: 2 weeks

Add simple embedded RADIUS server support to libradius, by extending existing
API, keeping backward compatibility.

First consumer for this functionality is going to become forthcoming MPD-5.4,
supporting CoA and DR of RFC 3576: Dynamic Authorization Extensions to RADIUS.

MFC after: 1 month

- Added rad_demangle() for demangling user-passwords (needed for
MS-CHAPv1 MPPE-keys).
- Added rad_demangle_mppe_key() for demangling mppe-keys (needed
for MPPE-keys).
- Added some typecasts for avoiding compiler warnings.
- Fix: better handle wrong usage of the lib (if the programmer
has not called rad_create_request() but rad_put_*(), then a
weird error message was returned).
- Added a new function for putting the Message-Authenticator.
- Verify the Message-Authenticator, if it was found inside a
response packet and silently drop the packet, if the validation
failed.
- Implicitly put the Message-Authenticator, if the EAP-Message
attribute was added.
- Added some missing defines.

Submitted by: Michael Bretterklieber
PR: 46555

Add support for vendor specific RADIUS extensions.

Only the extensions from rfc2548 are specified for now.

Add support for RADIUS accounting. Note, this changes the format
of the /etc/radius.conf file. But the code contains hacks for
backward compatibility, so old files will continue to work.

I updated the man pages and made a couple of minor changes, but
everything else was submitted by Oleg.

PR: misc/14284
Submitted by: Oleg Semyonov <os@altavista.net>

Allow an alternate to rad_send_request() for programs that
don't wish to wait for the RADIUS server to respond.
Reviewed by: jdp

Install -C radlib.h

Don't insist that RAD_USER_PASSWORD is supplied before
calling rad_send_request(). Instead, insist on only one
of RAD_USER_PASSWORD and RAD_CHAP_PASSWORD.

Sponsored by: Internet Business Solutions Ltd., Switzerland

This commit was generated by cvs2svn to compensate for changes in r41118,
which included commits to RCS files with non-trunk default branches.

Initial import of RADIUS client library donated by Juniper Networks, Inc.