Fixed typo
Update config.rst

doctrine_mongodb.connections.id.options.persist is remove
Fix issue https://github.com/doctrine/DoctrineMongoDBBundle/issues/229
Merging #530
Merge pull request #532 from saro0h/fix-cookbook-session

Fixed typo
Merge pull request #536 from oallain/patch-1

Update config.rst
Merge branch 'master' into 2.4