retitle 610979 6tunnel: IPV4 option (-4) should warn if both addresses are already IPV4 thanks
[Note to previous message] the commit to 1:0.12-1 debian/chnagelog where fix is recorded is: https://anonscm.debian.org/cgit/collab-maint/6tunnel.git/commit/?id=bd77d3ca9a331198f9ade4773b80a8b363c669e5
