The port mistakingly deems net/p5-IO-INET6 as a mandatory dependancy for
mrtg. This isn't the case; I took a look at the mrtg code, and support
for IPv6 is optional, with proper perl code to detect if IPv6 modules
are installed or not.
Therefore, we should be honouring WITHOUT_IPV6 for this port.
Fix: Apply below patch.
How-To-Repeat: Should be obvious.
Over to maintainer
Patch committed. Thanks!