Deprecate alternative BD connection encoding

CHANGELOG.md

@@ -3,6 +3,11 @@
 The present file will list all changes made to the project; according to the
 [Keep a Changelog](http://keepachangelog.com/) project.
 
+## [9.5.3] 2020-11-25
+
+### Deprecated
+- Usage of alternative DB connection encoding (`DB::$dbenc` property).
+
 ## [9.5.2] 2020-10-07
 
 ### API changes

inc/dbmysql.class.php

@@ -198,6 +198,9 @@ class DBmysql {
          $this->connected = false;
          $this->error     = 2;
       } else {
+         if (isset($this->dbenc)) {
+            Toolbox::deprecated('Usage of alternative DB connection encoding (`DB::$dbenc` property) is deprecated.');
+         }
          $dbenc = isset($this->dbenc) ? $this->dbenc : "utf8";
          $this->dbh->set_charset($dbenc);
          if ($dbenc === "utf8") {