[fpc-pascal] Group arguments from overloaded functions in fpdoc

[Marco van de Voort]

In our previous episode, dhkblaszyk at zeelandnet.nl said:
> > See also
> > http://bugs.freepascal.org/view.php?id=14843
> >
> Could XML attributes be used to distinguish overloaded functions? eg
>      <element name="UIContext.doButton.Result">
>         <short result="boolean">boolean result</short>
>         <short result="integer">integer result</short>
>       </element>
> 
> It should be relatively easy to implement I presume, not break any
> existing documentation and it would solve the overload problem.

The result-type is not enough to disambiguate overloaded versions. You would
need a full signature.