main.c: Added main().
GNUmakefile: Add a message after successful tests.
main.tt: a small test for main.
[BROK] - GNUmakefile: reimported from net-client
[BROK] - Adapt from net-client to be a server
Brought back to compilation
Removed everything related to net_server->target
Added net_server_start(), very similar to net_client_connect().