Update CHANGELOG.md for 11.6.11

[ci skip]

CHANGELOG.md

@@ -2,6 +2,30 @@
 documentation](doc/development/changelog.md) for instructions on adding your own
 entry.
+## 11.6.11 (2019-04-23)
+
+### Security (2 changes)
+
+- Fixed ability to see private groups by users not belonging to given group.
+- Fix XSS in resolve conflicts form.
+
+### Fixed (2 changes)
+
+- Bring back Rugged implementation of find_commit. !25477
+- Avoid excessive recursive calls with Rugged TreeEntries. !26813
+
+### Performance (1 change)
+
+- Bring back Rugged implementation of ListCommitsByOid. !27441
+
+### Other (4 changes)
+
+- Bring back Rugged implementation of GetTreeEntries. !25674
+- Bring back Rugged implementation of CommitIsAncestor. !25702
+- Bring back Rugged implementation of TreeEntry. !25706
+- Bring back Rugged implementation of commit_tree_entry. !25896
+
+
 ## 11.6.10 (2019-02-28)
 ### Security (21 changes)

changelogs/unreleased/security-56927-xss-resolve-conflicts-branch-name.yml

----
-title: Fix XSS in resolve conflicts form
-merge_request:
-author:
-type: security

changelogs/unreleased/security-shared-project-private-group.yml

----
-title: Fixed ability to see private groups by users not belonging to given group
-merge_request:
-author:
-type: security

changelogs/unreleased/sh-backport-list-commits-by-oid-rugged.yml

----
-title: Bring back Rugged implementation of ListCommitsByOid
-merge_request: 27441
-author:
-type: performance

changelogs/unreleased/sh-fix-rugged-tree-entries.yml

----
-title: Avoid excessive recursive calls with Rugged TreeEntries
-merge_request: 26813
-author:
-type: fixed

changelogs/unreleased/sh-rugged-commit-is-ancestor.yml

----
-title: Bring back Rugged implementation of CommitIsAncestor
-merge_request: 25702
-author:
-type: other

changelogs/unreleased/sh-rugged-commit-tree-entry.yml

----
-title: Bring back Rugged implementation of commit_tree_entry
-merge_request: 25896
-author:
-type: other

changelogs/unreleased/sh-rugged-find-commit.yml

----
-title: Bring back Rugged implementation of find_commit
-merge_request: 25477
-author:
-type: fixed

changelogs/unreleased/sh-rugged-get-tree-entry.yml

----
-title: Bring back Rugged implementation of TreeEntry
-merge_request: 25706
-author:
-type: other

changelogs/unreleased/sh-rugged-tree-entries.yml

----
-title: Bring back Rugged implementation of GetTreeEntries
-merge_request: 25674
-author:
-type: other