[fpc-pascal] Socket x SSocket

[Marco van de Voort]

> I'm getting a warning error in program with a new FPC 2.2.0 because the socket library was obsolete.
> The recomended option is ssocket library but I did'nt find this documentation.

It's not the sockets unit that is obsolete, but just a few of the older
(1.0.x) functions are deprecated.

Solution: use the "new" ones that are in there since 2003, and where
released in 2.0.  They can be recognized by the fp prefix.