IPv4 & IPv6 confusions in packages

[John Klos <john%ziaspace.com@localhost>]

I've noticed a couple of issues (pkgsrc on NetBSD 7):

With net/mtr, running mtr with a hostname which has both IPv4 and IPv6 
addresses on a machine with only IPv4 works only if -4 is specified:

mtr -4 netbsd.org
(works)

mtr netbsd.org
mtr: udp socket connect failed: No route to host

With net/rsync, if a hostname has both IPv4 and IPv6, then IPv6 is always 
used, even if rsync is called with -4 or --ipv4.

Is anyone else seeing these issues or similar issues with other packages?

John