static int DoTelnetHandshake(int sock);
static int ReceiveLine(int sock, char *buffer, int len, EchoMode echo);
static void RunShell(client_t *client);
static int DoTelnetHandshake(int sock);
static int ReceiveLine(int sock, char *buffer, int len, EchoMode echo);
static void RunShell(client_t *client);