[DAEMONS] telnetd: Don't disconnect upon receive timeout

We can get frequent receive timeout in telnetd_fill_rx_buffer()
if remote telnet client is becoming idle quite often.

Actually, getting receive timeout in socket programming is not
an error condition hence we should not disconnect connection
upon receive timeout.

This patch fixes telnetd_fill_rx_buffer() as-per above and also
minor fixes minor compilation error in daemon_telnetd_init().

Signed-off-by: Anup Patel <anup@brainfault.org>