[fpc-pascal] locale solution for unix systems

[Marco van de Voort]

In our previous episode, Graeme Geldenhuys said:
> 
> Yet if I create a simple console application the date formats etc are
> all en_US.  I want to write a new unit that doesn't rely on libc
> (seeing that it isn't available on all UNIX-style platforms)

libc what and where? Note that clocale depends on iconv, not (strictly)
libc, though in some system iconv is bundled into the libc library.