https://www.mail-archive.com/search?l=haproxy@formilux.org&q=subject:%22Re%5C%3A+unsupported+protocol+family+2+for+address+%27quic4%400.0.0.0%5C%3A4%22&o=newest&f=1
subject:"Re\: unsupported protocol family 2 for address 'quic4@0.0.0.0\:4"
subjectunsupportedprotocolfamily