Extra Author/Contributor information is leaked

[skruppy]

The metatags author, DC.Publisher, DC.Contributors, article:author and the schema.org Article is leaking full Author information, even if a less verbose Author output is configured with showuseras.

This might even impact performance (e.g. with authAD).

To fix this, I have several suggestions open for discussion:

• Always stick to the showuseras configuration.
• Add a plugin specific configuration.
  • Privacy by default: So the default should be "loginname", like the showuseras default.
  • Optional extra option like_showuseras
  • Optional extra option none
• If useMetaAuthor is not set, show nowhere author informations.