[RFA] Update NEWS for v5.1

[Eli Zaretskii]

> Date: Fri, 20 Jul 2001 13:11:48 +0200
> From: Pierre Muller <muller@cerbere.u-strasbg.fr>
> 
> What about adding this text in front of the missing features ?
> 
> * Partial support for debugging Pascal programs.
> 
>   Support for pascal language is partially included
>   Available features are:
> -- Support for pascal specific types like sets.
> -- Automatic recognition of pascal sources based on standard extensions
> -- Pascal like display of types, variables and functions
> -- Pascal expression parser

Sounds good, thanks.