Update changelog.

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
 
-v 7.10.0 (unreleased)
+v 7.9.1
   - Include missing events and fix save functionality in admin service template settings form (Stan Hu)
   - Fix "Import projects from" button to show the correct instructions (Stan Hu)
-  - Fix dots in Wiki slugs causing errors (Stan Hu)
   - Fix OAuth2 issue importing a new project from GitHub and GitLab (Stan Hu)
-  - Update poltergeist to version 1.6.0 to support PhantomJS 2.0 (Zeger-Jan van de Weg)
-  - Fix cross references when usernames, milestones, or project names contain underscores (Stan Hu)
-  - Disable reference creation for comments surrounded by code/preformatted blocks (Stan Hu)
-  - enable line wrapping per default and remove the checkbox to toggle it (Hannes Rosenögger)
-  - extend the commit calendar to show the actual commits made on a date (Hannes Rosenögger)
-  - Fix a link in the patch update guide
-  - Add a service to support external wikis (Hannes Rosenögger)
-  - List new commits for newly pushed branch in activity view.
-  - Add sidetiq gem dependency to match EE
-  - Add changelog, license and contribution guide links to project sidebar.
-  - Improve diff UI
-  - Fix alignment of navbar toggle button (Cody Mize)
-  - Identical look of selectboxes in UI
-  - Move "Import existing repository by URL" option to button.
-  - Improve error message when save profile has error.
-  - Passing the name of pushed ref to CI service (requires GitLab CI 7.9+)
-  - Add location field to user profile
-  - Fix print view for markdown files and wiki pages
-  - Improve GitLab performance when working with git repositories
-  - Add tag message and last commit to tag hook (Kamil Trzciński)
-  - Restrict permissions on backup files
-  - Improve oauth accounts UI in profile page
-  - Add ability to unlink connected accounts
-  - Replace commits calendar with faster contribution calendar that includes issues and merge requests
-  - Add inifinite scroll to user page activity
+  - Fix for LDAP with commas in DN
+  - Fix missing events and in admin Slack service template settings form (Stan Hu)
   - Don't show commit comment button when user is not signed in.
+  - Downgrade gemnasium-gitlab-service gem
 
-v 7.9.0 (unreleased)
+v 7.9.0
   - Add HipChat integration documentation (Stan Hu)
   - Update documentation for object_kind field in Webhook push and tag push Webhooks (Stan Hu)
   - Fix broken email images (Hannes Rosenögger)