Merge branch '2.7' into 2.8

* 2.7:
  tweaks for 2.7
  Fixing build error
  Tweaks thanks to everyone!
  [WIP] Reworking most of the registration form:
  Fixing build problems and wrong links
  changing includes to links
  Updating book examples to not use deprecated validation methods
  Updated constraint reference docs for Null->IsNull, False->IsFalse, True->IsTrue
  Creating placeholder constraint rst docs for deprecated usage
  Renaming constraint rst files to Is* to preserve edit history
  Fixes thanks to Stof
  fixing build failure
  Tweaks - see symfony#5314

book/validation.rst

@@ -630,7 +630,7 @@ this method must return ``true``:
         class Author
         {
             /**
-             * @Assert\True(message = "The password cannot match your first name")
+             * @Assert\IsTrue(message = "The password cannot match your first name")
              */
             public function isPasswordLegal()
             {
@@ -675,7 +675,7 @@ this method must return ``true``:
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addGetterConstraint('passwordLegal', new Assert\True(array(
+                $metadata->addGetterConstraint('passwordLegal', new Assert\IsTrue(array(
                     'message' => 'The password cannot match your first name',
                 )));
             }
@@ -937,7 +937,7 @@ username and the password are different only if all other validation passes
             private $password;
 
             /**
-             * @Assert\True(message="The password cannot match your username", groups={"Strict"})
+             * @Assert\IsTrue(message="The password cannot match your username", groups={"Strict"})
              */
             public function isPasswordLegal()
             {
@@ -1011,7 +1011,7 @@ username and the password are different only if all other validation passes
                 $metadata->addPropertyConstraint('username', new Assert\NotBlank());
                 $metadata->addPropertyConstraint('password', new Assert\NotBlank());
 
-                $metadata->addGetterConstraint('passwordLegal', new Assert\True(array(
+                $metadata->addGetterConstraint('passwordLegal', new Assert\IsTrue(array(
                     'message' => 'The password cannot match your first name',
                     'groups'  => array('Strict'),
                 )));

components/config/definition.rst

@@ -205,6 +205,10 @@ Before defining the children of an array node, you can provide options like:
 ``addDefaultsIfNotSet()``
     If any child nodes have default values, use them if explicit values
     haven't been provided.
+``normalizeKeys(false)``
+    If called (with ``false``), keys with dashes are *not* normalized to underscores.
+    It is recommended to use this with prototype nodes where the user will define
+    a key-value map, to avoid an unnecessary transformation.
 
 A basic prototyped array configuration can be defined as follows::
 
@@ -303,6 +307,13 @@ The output configuration will be exactly the same as before. In other words, the
 ``sf_connection`` and ``default`` configuration keys are lost. The reason is that
 the Symfony Config component treats arrays as lists by default.
 
+.. note::
+
+    As of writing this, there is an inconsistency: if only one file provides the
+    configuration in question, the keys (i.e. ``sf_connection`` and ``default``)
+    are *not* lost. But if more than one file provides the configuration, the keys
+    are lost as described above.
+
 In order to maintain the array keys use the ``useAttributeAsKey()`` method::
 
     $node