Merge branch 'stable-2.7'

* stable-2.7:
  Bump openid4java dependency to 0.9.8
  Provide direct link to REST API documentation
  init: Gracefully handle missing browser
  Improve explanation of path conflicts in project config doc
  init: Don't set username on upgrade if database.type is JDBC

Change-Id: Ia48eb8428588b598cb10a9ed1d4079a6abf42580