phpdoc fix
Made REST output indenting optional
Add tracking of the prepended config file

This allows the container to know that the file is involved in the config and so should be tracked for changes to reload the cache in debug mode.
Courtesy to @lolautruche who just listed it as an inconvenient of prependExtensionConfig during his SymfonyLive talk
Merge pull request #766 from bdunogier/rest_output_indenting

EZP-22583: Made REST output indenting optional
impl/EZP-22163 Implemented user/sessions/<id>/refresh
plus refactoring of user/sessions. Specifications have also been updated
Merge pull request #753 from StephaneDiot/impl/EZP-22163_Re-authenticate_existing_session_on_login

Fix EZP-22163: As a REST User I need to re authenticate existing session on login
Add bc doc on RESTv2 POST /user/sessions changes
(cherry picked from commit eb842709ebe1dd99d48084d7395d9a42ac511b1d)
Merge pull request #791 from stof/patch-1

Add tracking of the prepended config file
Fixed missing ";" in EzPublishRestExtension

See #791
Also added file_get_contents() to YAML to be compliant to Symfony 3.0