Rev News 16: mention the 2.8.x and 2.9.0-rcx releases

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

rev_news/drafts/edition-16.md

@@ -247,6 +247,9 @@ itself so I don't have extra dependencies :)
 
 ## Releases
 
+* Git [2.8.3](http://article.gmane.org/gmane.comp.version-control.git/295081) and [2.8.4](http://article.gmane.org/gmane.linux.kernel/2236998).
+* Git for Windows [2.8.3](https://groups.google.com/forum/#!topic/git-for-windows/P008PLusCxw) and [2.8.4](https://groups.google.com/forum/#!topic/git-for-windows/LtFxynlPdAc).
+* Git release candidates [2.9.0-rc0](http://article.gmane.org/gmane.comp.version-control.git/295407), [2.9.0-rc1](http://article.gmane.org/gmane.linux.kernel/2231742) and [2.9.0-rc2](http://article.gmane.org/gmane.linux.kernel/2236999).
 * git-multimail [1.3.0](https://github.com/git-multimail/git-multimail/releases/tag/1.3.0) and
 [1.3.1](https://github.com/git-multimail/git-multimail/releases/tag/1.3.1) were released,
  with a focus on options to customize emails, more documentation and