Merge branch '5.3' into 5.4

* 5.3:
  [Process] exclude argv/argc from possible default env vars
  [HttpClient] fix closing curl multi handle when destructing client
  [Validator] Add missing Czech translations

Author: nicolas-grekas

Resources/translations/validators.cs.xlf

@@ -394,6 +394,14 @@
                 <source>This value is not a valid CSS color.</source>
                 <target>Tato hodnota není platná barva CSS.</target>
             </trans-unit>
+            <trans-unit id="102">
+                <source>This value is not a valid CIDR notation.</source>
+                <target>Tato hodnota není platná notace CIDR.</target>
+            </trans-unit>
+            <trans-unit id="103">
+                <source>The value of the netmask should be between {{ min }} and {{ max }}.</source>
+                <target>Hodnota masky sítě musí být mezi {{ min }} a {{ max }}.</target>
+            </trans-unit>
         </body>
     </file>
 </xliff>