Revision 315532

MFC r314716:
  Add IPv6 support to O_IP_DST_LOOKUP opcode.

  o check the size of O_IP_SRC_LOOKUP opcode, it can not exceed the size of
    ipfw_insn_u32;
  o rename ipfw_lookup_table_extended() function into ipfw_lookup_table() and
    remove old ipfw_lookup_table();
  o use args->f_id.flow_id6 that is in host byte order to get DSCP value;
  o add SCTP ports support to 'lookup src/dst-port' opcode;
  o add IPv6 support to 'lookup src/dst-ip' opcode.

  PR:		217292
  Sponsored by:	Yandex LLC
  Differential Revision:	https://reviews.freebsd.org/D9873