* stable-2.16:
PG: Don't get gitweb weblink from ServerInfo
Set version to 2.15.9
ListProjects: Refactor to avoid excessive heap usage
ListProjectsIT: Add test for parent candidates option
Fix support for deleting branches (if you have can_delete)
Remove redundant release notes
FileApi: Add a method to set a file's "reviewed" flag
Fix support for deleting branches (if you have can_delete)
Change-Id: I2e256821671efd0949ab85efe28aebfc9c184b34