Merge branch '4.0' into 4.1

* 4.0:
  [HttpKernel] reset kernel start time on reboot
  Add code of Conduct links in our README
  bumped Symfony version to 4.0.12
  [DI] never inline lazy services
  updated VERSION for 4.0.11
  updated CHANGELOG for 4.0.11
  bumped Symfony version to 3.4.12
  updated VERSION for 3.4.11
  updated CHANGELOG for 3.4.11
  Default testsuite to latest PHPUnit 6.*
  [Github] Update the pull-request template
  bumped Symfony version to 2.8.42
  updated VERSION for 2.8.41
  updated CHANGELOG for 2.8.41
  [HttpFoundation] Fix cookie test with xdebug
  [Serializer] Check the value of enable_max_depth if defined
  [DI] remove dead code
  [PhpUnitBridge] silence some stderr outputs
  [Validator] Update sl translation

Author: nicolas-grekas

Resources/translations/validators.sl.xlf

@@ -314,6 +314,10 @@
                 <source>This is not a valid Business Identifier Code (BIC).</source>
                 <target>To ni veljavna identifikacijska koda podjetja (BIC).</target>
             </trans-unit>
+            <trans-unit id="82">
+                <source>Error</source>
+                <target>Napaka</target>
+            </trans-unit>
         </body>
     </file>
 </xliff>