BIND covered under which license and does it conatin any cryptographic content ?

[Stephane Bortzmeyer]

On Thu, Jul 19, 2007 at 01:21:39AM -0000,
 Lulu <neoequal at gmail.com> wrote 
 a message of 21 lines which said:

> I unable to confirm about licensing of BIND9 in other words bind9
> covered under which license.

Warning 1: IANAL
Warning 2: I do not work for ISC and I wrote zero line of code in BIND

> IN the site I found a line written about license is that "BIND is
> available at no charge under the BSD License"

It seems a small error. While ISC license is a 2-clause BSD, I do not
think that many people call "BSD" a license which is not the 3-clause
or the 4-clause one.
 
> Secondly the source tar ball contain no separate file called License
> rather a COPYRIGHT file is there but it says nothing about BSD there
> like whether it is 2 clause, 3 clause or anything else.

[It is clearly the authoritative information. A Web page, even hosted
at ISC, carries less weight.]

In practice, ISC license is a BSD, with the third clause ("Neither the
name of the <organization> nor the names of its contributors may be
used to endorse...") removed.

> Thirdly in wikipedia I found BIND9 covered under ISC license which is
> functionally equivalent to BSD.
> http://en.wikipedia.org/wiki/ISC_licence

It seems a fair description. Do note that ISC does not seem to use the
name "ISC license". 

And why do some people write licence with a c and some with a s?