backport 1.6.1 changelog (#5507)

CHANGELOG.md

@@ -4,6 +4,16 @@ 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).
 
+## [1.6.1](https://github.com/go-gitea/gitea/releases/tag/v1.6.1) - 2018-12-08
+* BUGFIXES
+  * Fix dependent issue searching when gitea is run in subpath (#5392) (#5400)
+  * API: '/orgs/:org/repos': return private repos with read access (#5393)
+  * Fix repository deletion when there is large number of issues in it (#5426) (#5434)
+  * Word-break the WebHook url to prevent a ui-break (#5445)
+  * Admin should be able to delete repos via the API even if they are not a member of the organization (#5443) (#5447)
+  * Ensure that the `closed_at` is set for closed (#5450)
+  * Fix topic name length on database (#5493) (#5495)
+
 ## [1.6.0](https://github.com/go-gitea/gitea/releases/tag/v1.6.0) - 2018-11-22
 * BREAKING
   * Respect email privacy option in user search via API (#4512)