As EiffelNet release is related to EiffelStudio release,
the condition "compiler version <= 15.02) is used,
which means that before for release 15.01 and previous EiffelStudio
releases, the project uses a specific TCP_STREAM_SOCKET, and for
upcoming releases, it will use another version of that class).
(see rev#96640 from eiffelstudio subversion repository)