cmd: fix environment variables not setting command line flags

Before this fix quite a lot of the commands were ignoring environment
variables intended to set flags.

cmd/lsd/lsd.go

@@ -7,6 +7,7 @@ import (
 	"github.com/rclone/rclone/cmd"
 	"github.com/rclone/rclone/cmd/ls/lshelp"
 	"github.com/rclone/rclone/fs"
+	"github.com/rclone/rclone/fs/config/flags"
 	"github.com/rclone/rclone/fs/operations"
 	"github.com/spf13/cobra"
 )
@@ -17,7 +18,8 @@ var (
 
 func init() {
 	cmd.Root.AddCommand(commandDefinition)
-	commandDefinition.Flags().BoolVarP(&recurse, "recursive", "R", false, "Recurse into the listing.")
+	cmdFlags := commandDefinition.Flags()
+	flags.BoolVarP(cmdFlags, &recurse, "recursive", "R", false, "Recurse into the listing.")
 }
 
 var commandDefinition = &cobra.Command{