Author: Fabrice MARIE <fabrice@celestix.com>
Status: experimental

This option adds CONFIG_IP_NF_MATCH_IPV4OPTIONS, 
which supplies ip options match.

Suppported options are:
--ssrr
  To match packets with the flag strict source routing.
--lsrr
  To match packets with the flag loose source routing.
--no-srr
  To match packets with no flag for source routing.
[!] --rr
  To match packets with the RR flag.
[!] --ts
  To match packets with the TS flag.
[!] --ra
  To match packets with the router-alert option.

Example:
  $ iptables -A input -m ipv4options --rr -j DROP
  will drop packets with the record-route flag.

  $ iptables -A input -m ipv4options --ts -j DROP
  will drop packets with the timestamp flag.

Bug ?
  I tested --ts and --rr, but not source routing issues, nor the router-alert
  since I don't know enough about them. So please let me know if it works or
  doesn't work :)
