Merge branch '2.8' into 3.0

* 2.8:
  [DI] Fix internal caching in AutowirePass
  [PropertyInfo] Remove useless return statement
  Replace iconv_*() uses by mb_*(), add mbstring polyfill when required

Conflicts:
	src/Symfony/Bridge/Doctrine/composer.json
	src/Symfony/Component/Validator/composer.json

Author: nicolas-grekas

Logger/DbalLogger.php

@@ -95,8 +95,8 @@ private function normalizeParams(array $params)
             }
 
             // detect if the too long string must be shorten
-            if (self::MAX_STRING_LENGTH < iconv_strlen($params[$index], 'UTF-8')) {
-                $params[$index] = iconv_substr($params[$index], 0, self::MAX_STRING_LENGTH - 6, 'UTF-8').' [...]';
+            if (self::MAX_STRING_LENGTH < mb_strlen($params[$index], 'UTF-8')) {
+                $params[$index] = mb_substr($params[$index], 0, self::MAX_STRING_LENGTH - 6, 'UTF-8').' [...]';
                 continue;
             }
         }

composer.json

@@ -17,12 +17,13 @@
     ],
     "require": {
         "php": ">=5.5.9",
-        "doctrine/common": "~2.4"
+        "doctrine/common": "~2.4",
+        "symfony/polyfill-mbstring": "~1.0"
     },
     "require-dev": {
         "symfony/stopwatch": "~2.8|~3.0",
         "symfony/dependency-injection": "~2.8|~3.0",
-        "symfony/form": "~3.0,>3.0-BETA1",
+        "symfony/form": "~3.0",
         "symfony/http-kernel": "~2.8|~3.0",
         "symfony/property-access": "~2.8|~3.0",
         "symfony/property-info": "~2.8|3.0",