[fpc-pascal] Add API to official documentation search

[Michael Van Canneyt]

On Mon, 18 Nov 2019, Bo Berglund via fpc-pascal wrote:

> On Sun, 17 Nov 2019 23:35:34 +0100 (CET), Michael Van Canneyt
> <michael at freepascal.org> wrote:
>
>> I will of course need to update the database when we release 3.2 and I update the
>> docs.
>>
>
> I had a look at it too and searched for baseunix fpopen etc.
> Found this:
> https://www.freepascal.org/docs-html/rtl/baseunix/fpopen.html
>
> Look at the example, specifically the top comment of the example:
>
> { Program to demonstrate the fdOpen, fdwrite and fdCLose functions. }
>
> Is this a typo or indication of early, later changed naming
> convention?

Changed naming convention when switching from 'linux' unit to more general
*unix units, more than 15 years ago.

> Should be fp at the start of the names rather than fd, right?

For baseunix, yes. I have fixed it. Thanks for pointing it out.

Michael.