Update CHANGELOG.md for 8.16.4

[ci skip]

CHANGELOG.md

@@ -2,6 +2,21 @@
 documentation](doc/development/changelog.md) for instructions on adding your own
 entry.
 
+## 8.16.4 (2017-02-02)
+
+- Support non-ASCII characters in GFM autocomplete. !8729
+- Fix search bar search param encoding. !8753
+- Fix project name label's for reference in project settings. !8795
+- Fix filtering with multiple words. !8830
+- Fixed services form cancel not redirecting back the integrations settings view. !8843
+- Fix filtering usernames with multiple words. !8851
+- Improve performance of slash commands. !8876
+- Remove old project members when retrying an export.
+- Fix permalink discussion note being collapsed.
+- Add project ID index to `project_authorizations` table to optimize queries.
+- Check public snippets for spam.
+- 19164 Add settings dropdown to mobile screens.
+
 ## 8.16.3 (2017-01-27)
 
 - Add caching of droplab ajax requests. !8725

changelogs/unreleased/19164-mobile-settings.yml

----
-title: 19164 Add settings dropdown to mobile screens
-merge_request:
-author:

changelogs/unreleased/27067-mention-user-dropdown-does-not-suggest-by-non-ascii-characters-in-name.yml

----
-title: Support non-ASCII characters in GFM autocomplete
-merge_request: 8729
-author:

changelogs/unreleased/27089-26860-27151-fix-discussion-note-permalink-collapsed.yml

----
-title: Fix permalink discussion note being collapsed
-merge_request:
-author:

changelogs/unreleased/27248-filtered-search-does-not-allow-filtering-labels-with-multiple-words.yml

----
-title: Fix filtering with multiple words
-merge_request: 8830
-author:

changelogs/unreleased/27259-label-for-references-the-wrong-associated-text-input.yml

----
-title: Fix project name label's for reference in project settings
-merge_request: 8795
-author:

changelogs/unreleased/fix-cancel-integration-settings.yml

----
-title: Fixed services form cancel not redirecting back the integrations settings view
-merge_request: 8843
-author:

changelogs/unreleased/fix-filtering-username-with-multiple-words.yml

----
-title: Fix filtering usernames with multiple words
-merge_request: 8851
-author:

changelogs/unreleased/fix-import-user-validation-error.yml

----
-title: Remove old project members when retrying an export
-merge_request: 
-author: 

changelogs/unreleased/fix-search-bar-search-param.yml

----
-title: Fix search bar search param encoding
-merge_request: 8753
-author:

changelogs/unreleased/sh-add-project-id-index-project-authorizations.yml

----
-title: Add project ID index to `project_authorizations` table to optimize queries
-merge_request:
-author:

changelogs/unreleased/snippet-spam.yml

----
-title: Check public snippets for spam
-merge_request:
-author:

changelogs/unreleased/zj-slow-service-fetch.yml

----
-title: Improve performance of slash commands
-merge_request: 8876
-author: