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

one use

	golang.org/x/sys/unix (current package)
		ztypes_linux.go#L3088: 	RTNLGRP_BRVLAN        = 0x21

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