add missing class var; add phpdocs

src/Symfony/Component/Security/Core/Encoder/MessageDigestPasswordEncoder.php

@@ -20,6 +20,7 @@ class MessageDigestPasswordEncoder extends BasePasswordEncoder
 {
     private $algorithm;
     private $encodeHashAsBase64;
+    private $iterations;
 
     /**
      * Constructor.

src/Symfony/Component/Security/Core/Encoder/PlaintextPasswordEncoder.php

@@ -20,6 +20,11 @@ class PlaintextPasswordEncoder extends BasePasswordEncoder
 {
     private $ignorePasswordCase;
 
+    /**
+     * Constructor.
+     *
+     * @param Boolean $ignorePasswordCase Compare password case-insensitive
+     */
     public function __construct($ignorePasswordCase = false)
     {
         $this->ignorePasswordCase = $ignorePasswordCase;