am 05ad00ea: am 5890600d: Add a better explanation about how to deal with user modules

Merge commit '05ad00eac9edda58c5cd3110853a6b93d6cc4e89'

* commit '05ad00eac9edda58c5cd3110853a6b93d6cc4e89':
  Add a better explanation about how to deal with user modules