iodine: use procd, add extra options

iodine: use procd, add extra options

Iodine now uses a procd init.d service and output is sent to the system
log.

Two new options have been added:

- debuglevel — increases the verbosity of debug output.

- check_client_ip — controls whether to accept or reject queries from
  different IP addresses for the same login. This should be disabled if
  the recursive DNS server might send queries from varying IPs. However,
  disabling this option also makes replay attacks significantly easier.

Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>