Update the security config with the latest Sf2.2 changes

The internal route has been removed, see https://github.com/symfony/symfony/pull/6829 for details.
merged branch vicb/patch-1 (PR #482)

This PR was merged into the master branch.

Commits
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760d624 Update the security config with the latest Sf2.2 changes

Discussion
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Update the security config with the latest Sf2.2 changes

The internal route has been removed, see https://github.com/symfony/symfony/pull/6829 for details.