bug symfony#25571 [SecurityBundle] allow auto_wire for SessionAuthenticationStrategy class (xavren)

This PR was merged into the 3.4 branch.

Discussion
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[SecurityBundle] allow auto_wire for SessionAuthenticationStrategy class

| Q             | A
| ------------- | ---
| Branch?       | 3.4 up to 4.0 for deprecation fixe
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | yes
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

Commits
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b36154e allow auto_wire for SessionAuthenticationStrategy class

Author: nicolas-grekas

src/Symfony/Bundle/SecurityBundle/Resources/config/security.xml

@@ -62,6 +62,7 @@
         <service id="security.authentication.session_strategy" class="Symfony\Component\Security\Http\Session\SessionAuthenticationStrategy">
             <argument>%security.authentication.session_strategy.strategy%</argument>
         </service>
+        <service id="Symfony\Component\Security\Http\Session\SessionAuthenticationStrategyInterface" alias="security.authentication.session_strategy" />
 
         <service id="security.encoder_factory.generic" class="Symfony\Component\Security\Core\Encoder\EncoderFactory">
             <argument type="collection" />