changes from 1.2 to 1.3, to quote feico's message:
>It does add little functionality over version 1.2, but the code
>quality is a lot higher and many bugs/misfeatures and loose ends
>have been fixed.
XXX the pkgsrc Makefile requires USE_INET6 in mk.conf at this moment,
as the program is meaningful only if you have IPv4/v6 dual-stack support.
I'm not sure if it actually requires IPv6 in kernel...