net-irc/quassel forcibly passes a --listen argument to quasselcore, defaulting to 0.0.0.0
This forces quassel to ipv4-only on ipv6-capable networks, which is a wrong default, to say the least.
--listen should only be used to limit connection to certain client IP addresses, not disable IPv6 by default.
The default probably shouldn't pass --listen at all and only do it if LISTEN variable is set in configuration, for the purpose of limiting IPs that can connect.
As-is one has to figure out to set LISTEN="0.0.0.0,::" in conf.d file and hope that enables ipv6 too, otherwise e.g. quasseldroid won't be able to connect, when phone is on a ipv6 network and the core hostname has an AAAA entry.
Don't use OpenRC myself. @Patrick could you please take care of it?