Restore viewer() function to "Responsible Users" tokenizer in Differential
Ref T10939. This makes the viewer() function work again. It retains its own meaning (viewer, plus all their projects and packages).
There's no exact-viewer() function; we could conceivably add one eventually if we need it.
- Queried for viewer(), got the same results as querying by my own username.
- Browsed function in token browser.
- Reviewed autogenerated documentation.
Reviewed By: chad
Maniphest Tasks: T10939
Differential Revision: https://secure.phabricator.com/D15951