Clarify reviewer setting in documentation

The filter.<filter>.reviewer can be a user's email address or
username, but it must be an exact case-sensitive match. Mention
this in the documentation.

Change-Id: I9bf3a45a235e1929ad8667ef97c820f5f10aeb5e
1 file changed
tree: 01a486dcb1a88060a1286fbbdd5a3314d47b69ed
  1. lib/
  2. src/
  3. tools/
  4. .buckconfig
  5. .gitignore
  6. BUCK
  7. LICENSE
  8. pom.xml