Vendor-Specific Attribute support

This code supports the use of vendor specific attributes. This
type of attribute is defined in RFC-2138 and is used to support
'propietary' extensions on top of the base RADIUS specification.

There are two new kinds of entries in the RADIUS dictionary in
order to specify VSAs.

VENDORATTR <vendor> <attribute> <id> <type>

This entry is used to create a new kind of vendor attribute,
such as in this example

VENDORATTR 	9 	cisco-avpair 	1 	string

This creates a new vendor-specific attribute for vendor 9 (Cisco
Systems), with name 'cisco-avpair'. This attribute is identified by
numeric id '1' and is associated with a string value.

The second type of entry allows the specification of named values.
The following is an hypotetical example of named value entry.

VENDORATTR	9	cisco-enum	254	integer
VENDORVALUE	9	cisco-enum	Value-1	1
VENDORVALUE	9	cisco-enum	Value-2	2
VENDORVALUE	9	cisco-enum	Value-3	3

Questions and comments about the package can be sent to the
author of the module, Christopher Masto <chris@netmonger.net>.

Questions and comments about the VSA support can be directed
to the author of this part of the code, Luis E. Muņoz 
<luismunoz@cpan.org>

Ian Smith <iansmith@ncinter.net> contributed code for 3COM 
VSAs.

$Id: README.VSA 7 2003-01-08 03:42:41Z lem $