Sync changelog.

changelog.md

@@ -228,6 +228,38 @@
    * wmllint, wmlscope and wmlindent now support the command line `--version` flag, which reports the current version of Wesnoth (issue #6346).
    * wmllint is now capable of handling unit levels and types when checking recruitment patterns.
 
+## Version 1.16.4
+ ### Campaigns
+   * Eastern Invasion
+     * S07a:
+       * Better handling for side 2 (issue #4145)
+       * Fixed Grug upkeep, added dialogue about ogres joining (issue #4145)
+   * Northern Rebirth
+     * S1: Fixed Al'Tar confusing an orc for a slave (issue #6735)
+   * Under the Burning Suns
+     * S5: Enforce encounter with the Cloaked Figure (issue #6364)
+ ### Translations
+   * Updated translations: Arabic, British English, Chinese (Traditional), Czech, Polish, Finnish, French
+ ### Units
+    * Fixed Warden’s and Arbiter’s animations popping on water tiles (issue #6508)
+ ### User interface
+   * Resolved broken layout in some low-resolution configurations (issue #5620, #6544)
+ ### Miscellaneous and Bug Fixes
+   * Fixed path finding visibility bug that sometimes caused OOS errors on maps with tunnels and at least three sides that do not share vision (PR #6744)
+   * Fixed being unable to interact with units when Scroll Lock is active (issue #6759)
+   * Removing the Protect Unit Micro AI no longer causes a Lua error
+   * Fixed chance of being unscathed in damage calculation for some fights in which both units can die (issue #6590)
+   * Fixed visibility bug in ai_helper.get_attackable_enemies() for some complex filters
+   * Fixed bug in Bottleneck Micro AI involving units without moves on terrain with multiple open passages (issue #6599)
+   * Fixed error in Castle Switch CA of the Experimental AI after a leader was killed (issue #6440)
+   * Fixed error in retreat-injured CA when regenerate ability code does not include a value= key
+   * Retreat-injured CA no longer takes villages from allies
+   * Experimental AI no longer uses generic_recruit_engine: fixes a data leakage bug between Experimental AIs of different sides
+   * Experimental AI recruit rushers: include unit types from extra_recruit (issue #4924)
+   * Fix segfault when weapon is removed during attack (issues #4927 and #5914)
+   * Add no-unit error message for unit debug command (issue #6116)
+   * Significantly improve efficiency of move-to-any-enemy CA
+
 ## Version 1.16.3
  ### Add-ons client
    * Fixed: using the up or down arrow keys in small-screen mode returned to the title screen (issue #6485).