Added note about the support end of Samba 3 to WHATSNEW.TXT

[Jeremy Allison]

On Thu, Nov 06, 2014 at 08:50:55PM +0100, Marc Muehlfeld wrote:
> +
> +IMPORTANT NOTE ABOUT THE SUPPORT END OF SAMBA 3
> +=================================================
> +
> +With the final release of Samba 4.2, the last series of Samba 3 has
> +become discontinued! People still running 3.6 or a previous version,
> +should consider moving to a more recent and maintained version
> +(4.0 - 4.2). But one of the common misconceptions is, that Samba 4.x
> +automatically means "Active Directory only": This is wrong!
> +
> +Acting as an Active Directory Domain Controller is one of the enhancements,
> +included in Samba 4.0 and later. But 4.0 was just the next release
> +after the 3.6 series and contained all features of the previous ones -
> +including the NT4-style (classic) domain support. This means you can
> +update a Samba 3.x NT4-style PDC to 4.x, like you've updated in the
> +past (e. g. from 3.4.x to 3.5.x). You won't have to move your NT4-style
> +domain to an Active Directory!

> +And of course the possibility remains unchanged, to setup a new NT4-style
> +PDC with Samba 4.x, like done in the past (e. g. with openLDAP backend).

The above isn't good English. I'd recommend rewording to:

"The code suppoting NT4-style PDC's remains unchanged in Samba 4.x,
so you are still able to setup a new NT4-style PDC, exactly
the way it was done in Samba 3.6 or earlier versions (e. g. with
a shared openLDAP backend)."