Merge branch 'stable-2.11'

* stable-2.11:
  Point CGit link to new upstream
  Update 2.11 release notes
  Do not return 403 when clicking on Gitweb breadcrumb

Conflicts:
	gerrit-httpd/src/main/java/com/google/gerrit/httpd/gitweb/GitWebServlet.java

Change-Id: I0e5057e4fc08d92a16dcfd7fbdfdc684184fda35