Update the changelog and the upgrade instructions

Changelog.md

@@ -1,14 +1,17 @@
 Changelog
 =========
 
-### 2.1.0 (2017-xx-xx)
+### 2.1.0 (2018-02-16)
+
 * Dropped Symfony < 2.8 support.
 * Add Symfony 4 compatibility.
+* Refactored controllers and commands to use DI. Projects extending these classes will need to adapt their code (but should rather use supported extension points when possible).
 * Redirect to login when requesting resetting password with invalid token.
 * Added autocomplete hints for password inputs.
 * Fixed several incorrect Turkish translations.
 
 ### 2.0.2 (2017-11-29)
+
 * Fix empty password in ChangePasswordFormType.
 * Fix empty password in ProfileFormType.
 * Introduced aliases for autowiring user and group managers.

Upgrade.md

@@ -4,6 +4,14 @@ Upgrade instruction
 This document describes the changes needed when upgrading because of a BC
 break. For the full list of changes, please look at the Changelog file.
 
+## 2.0 to 2.1
+
+Controllers and commands now use DI and are defined as services.
+
+Projects overriding them will need to adapt their code to fit with these changes.
+Note that backward compatibility is not ensured for such usage. Relying on
+extension points of the bundle (mostly through events) is preferred.
+
 ## 2.0.0-alpha3 to 2.0.0-beta1
 
 Methods and properties removed from `FOS\UserBundle\Model\User`