Merge branch '4.4' into 5.0

* 4.4:
  Add missing use statements
  [Translation] Add missing use statement
  [Translation] Add missing use statement
  [Config][XmlReferenceDumper] Prevent potential \TypeError
  [Mailer] Fix broken mandrill http send for recipients with names
  [Translation] prefer intl domain when adding messages to catalogue
  Fix CS
  Fix CS
  Fail on empty password verification (without warning on any implementation)
  [Translation][Debug] Add installation and minimal example to README
  [Validator] try to call __get method if property is uninitialized
  Show both missing packages in the same error message
  Fix handling of empty_data's \Closure value in Date/Time form types

Author: fabpot

Encoder/NativePasswordEncoder.php

@@ -76,6 +76,10 @@ public function encodePassword(string $raw, ?string $salt): string
      */
     public function isPasswordValid(string $encoded, string $raw, ?string $salt): bool
     {
+        if ('' === $raw) {
+            return false;
+        }
+
         if (\strlen($raw) > self::MAX_PASSWORD_LENGTH) {
             return false;
         }

Encoder/SodiumPasswordEncoder.php

@@ -76,6 +76,10 @@ public function encodePassword(string $raw, ?string $salt): string
      */
     public function isPasswordValid(string $encoded, string $raw, ?string $salt): bool
     {
+        if ('' === $raw) {
+            return false;
+        }
+
         if (\strlen($raw) > self::MAX_PASSWORD_LENGTH) {
             return false;
         }

Tests/Encoder/NativePasswordEncoderTest.php

@@ -53,6 +53,7 @@ public function testValidation()
         $result = $encoder->encodePassword('password', null);
         $this->assertTrue($encoder->isPasswordValid($result, 'password', null));
         $this->assertFalse($encoder->isPasswordValid($result, 'anotherPassword', null));
+        $this->assertFalse($encoder->isPasswordValid($result, '', null));
     }
 
     public function testNonArgonValidation()

Tests/Encoder/SodiumPasswordEncoderTest.php

@@ -29,6 +29,7 @@ public function testValidation()
         $result = $encoder->encodePassword('password', null);
         $this->assertTrue($encoder->isPasswordValid($result, 'password', null));
         $this->assertFalse($encoder->isPasswordValid($result, 'anotherPassword', null));
+        $this->assertFalse($encoder->isPasswordValid($result, '', null));
     }
 
     public function testBCryptValidation()