EAP SRP-SHA1 support

[Stacy]

Hello Alan!
>   Don't worry about the allocation.  Just put the code on
> bugs.freeradius.org.  It will be audited for coding style, security,
> etc. as part of integrating with the server.
>
>   Alan DeKok.

Posted as bug 494.
I didn't figured how to put code there so I placed the code
at ftp and supplied a link in bug URL.
This machine has low bandwidth - so if you'll have troubles downloading - drop 
me a message - I'll try to find another location.

Stacy.