Improvements to our client/server TCP communication

[DP News-Robot]

We’ve made a number of improvements to our unit and the associated examples in examples/network/tcp_connection. The allows to use a “classic” TCP/IP server/client architecture to communicate in Castle Game Engine applications. It relies on Indy — FPC developers will need to download it. The examples in examples in examples/network/tcp_connection show a simple client and server …