Merge pull request nextcloud#4823 from nextcloud/changelog-master-sta…

…ble-3.9.0

Add changelog for 3.9.0

CHANGELOG.md

@@ -1,3 +1,16 @@
+3.9.0 (November, 12, 2019)
+
+- preview Markdown with syntax highlighting @AndyScherzinger
+- improved DavX5 integration @bitfireAT
+- AutoUpload: allow files to upload into subfolder
+- new media player service @ezaquarii
+- Remote wipe integration
+- Print from within Collabora
+- enhanced SingleSignOn
+- outdated server warning set to NC14
+
+For a full list, please see https://github.com/nextcloud/android/milestone/38
+
 ## 3.8.1 (October, 11, 2019)
 
 - upload images into subfolder, if source folder also has subfolder