[fpc-pascal] users.pp unit under Linux and FreeBSD

[Marco van de Voort]

In our previous episode, Graeme Geldenhuys said:
> 
> The issue was that the 'libc.pp' unit was not available for FreeBSD.
> I found the 'users.pp' unit which seems to have the methods I require.
> Is the 'users.pp' unit compatible with FreeBSD?

As far as I know yes, since 2.2.2. Also for OS X. 

Only the shadow functions are linux only.