Changelog 1.15.6 (#17457)

* Changelog 1.15.6

Unforunately #17435 is a somewhat critical bug and therefore we should
really release 1.15.6 as soon as possible.

 ## [1.15.6](https://github.com/go-gitea/gitea/releases/tag/v1.15.6) - 2021-10-27

* BUGFIXES
  * Prevent panic in serv.go with Deploy Keys (#17434) (#17435)
  * Fix CSV render error (#17406) (#17431)
  * Read expected buffer size (#17409) (#17430)

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Add 17456 and its backport

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Add 17464

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Add final pr

* Update date

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

CHANGELOG.md

@@ -4,6 +4,17 @@ This changelog goes through all the changes that have been made in each release
 without substantial changes to our git log; to see the highlights of what has
 been added to each release, please refer to the [blog](https://blog.gitea.io).
 
+## [1.15.6](https://github.com/go-gitea/gitea/releases/tag/v1.15.6) - 2021-10-28
+
+* BUGFIXES
+  * Prevent panic in serv.go with Deploy Keys (#17434) (#17435)
+  * Fix CSV render error (#17406) (#17431)
+  * Read expected buffer size (#17409) (#17430)
+  * Ensure that restricted users can access repos for which they are members (#17460) (#17464)
+  * Make commit-statuses popup show correctly (#17447) (#17466)
+* TESTING
+  * Add integration tests for private.NoServCommand and private.ServCommand (#17456) (#17463)
+
 ## [1.15.5](https://github.com/go-gitea/gitea/releases/tag/v1.15.5) - 2021-10-21
 
 * SECURITY