SRP unencumbered license statement

[Jeffrey Altman]

> bi-directional authentication mode (SRP-Z) requires a  
> separate licence, and is not free.  Only implicit server
> authentication mode is free.
> 
>         Your statement above appears at variance with the actual
> words from Stanford.  I'd encourage folks to go read the actual
> words from Stanford, not anyone's interpretations of them.

Implicit server authentication mode is the mode detailed by RFC 2945.
It is all that is necessary for our applications.