* kame/sys/netinet6/natpt_trans.c: Support FTP connection from v4   client to v6 server with non-passive mode. * kame/sys/netinet6/natpt_{defs,trans,tslot}.[ch]: Support packet   retransmission of when TCP payload was modified in FTP   translation.
* kame/sys/netinet6/natpt_trans.c: Support FTP connection from v4
  client to v6 server with non-passive mode.
* kame/sys/netinet6/natpt_{defs,trans,tslot}.[ch]: Support packet
  retransmission of when TCP payload was modified in FTP
  translation.

MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame