ping6 and other tool6 awkwardness

[Dmitry Butskoy]

Richard W.M. Jones wrote:
> On Tue, May 12, 2015 at 09:56:45AM +0200, Nikos Mavrogiannopoulos wrote:
>> While working for an updated ipcalc to support ipv6 transparently, I
>> figured we have more tools which are not IPv6-ready and awkwardly
>> provide an additional tool with a -6 suffix, supposedly for separate
>> IPv6 support. That looks like a relic of the past, we still drag. IPv6
>> support should be transparent in programs (fortunately we don't have
>> ssh6). Any objection to fill bugs to merge the following tools with
>> their ipv4 equivalent?
>>
>> ping6, geoiplookup6, tracepath6, traceroute6

Note, that traceroute already supports IPv6 transparently. The `-6' 
suffix/option is needed for cases when domain names are resolved to both 
IPv4 and IPv6 variants (as well as for compatibility with older versions 
etc.)

Regards,
Dmitry Butskoy