Sync up request context with root context just before calling command

The context passed on from main() may change before we hit callCommand,
so setting it in Parse is a bit optimistic.

cmd/ipfs/main.go

@@ -226,7 +226,6 @@ func (i *cmdInvocation) Parse(ctx context.Context, args []string) error {
 	if err != nil {
 		return err
 	}
-	i.req.Context().Context = ctx
 
 	repoPath, err := getRepoPath(i.req)
 	if err != nil {
@@ -279,6 +278,8 @@ func callCommand(ctx context.Context, req cmds.Request, root *cmds.Command, cmd
 	log.Info(config.EnvDir, " ", req.Context().ConfigRoot)
 	var res cmds.Response
 
+	req.Context().Context = ctx
+
 	details, err := commandDetails(req.Path(), root)
 	if err != nil {
 		return nil, err