const golang.org/x/sys/unix.RTMGRP_IPV6_IFINFO

one use

	golang.org/x/sys/unix (current package)
		zerrors_linux.go#L2881: 	RTMGRP_IPV6_IFINFO                          = 0x800

The pages are generated with Golds v0.7.6. (GOOS=linux GOARCH=amd64)