Merge pull request #5031 from daftaupe/dragonfly

Fix build on DragonFlyBSD

core/commands/mount_nofuse.go

-// +build linux darwin freebsd netbsd openbsd
+// +build linux darwin freebsd netbsd openbsd dragonfly
 // +build nofuse
 
 package commands

fuse/node/mount_nofuse.go

-// +build linux darwin freebsd netbsd openbsd
+// +build linux darwin freebsd netbsd openbsd dragonfly
 // +build nofuse
 
 package node