Draft of Gerrit v2.16.13 release notes
Draft of Gerrit v2.16.13 release notes

Change-Id: I5247a4a9f3781c42cd59d9e1f0ffcff2297bb7c0

GerritCodeReview/homepage,GerritCodeReview/homepage,GerritCodeReview/homepage,GerritCodeReview/homepage,GerritCodeReview/homepage