minor #1532 Docs: Update interface reference for csrf.token_manager (thisisandrew)
minor #1532 Docs: Update interface reference for csrf.token_manager (thisisandrew)

This PR was merged into the 2.1.x-dev branch.

Discussion
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Docs: Update interface reference for csrf.token_manager

The csrf.token_manager is an implementation of CsrfTokenManagerInterface
Fix the label and link to the reference
Update Usage section to include creation of a new token

Commits
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0a0c2d9 Update interface reference for csrf.token_manager

romainneutron/Silex,gencer/Silex,romainneutron/Silex,silexphp/Silex,romainneutron/Silex