[Messenger] Added a middleware that validates messages

[javiereguiluz]

See symfony/symfony#26648

@Nyholm I know you are busy with lots of contributions to open source projects ... but I hope you can take some time before the end of May to document this in time for Symfony 4.1 release. Thank you!

[Nyholm]

Oh, I forgot about this. I just came back from vacation.

Thank you @sroze

[sroze]

Hope you enjoyed :)

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On Wed, 9 May 2018 at 18:39, Tobias Nyholm ***@***.***> wrote: Oh, I forgot about this. I just came back from vacation. Thank you @sroze <https://github.com/sroze> — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#9641 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAxHERLlI3xJNfkT-lEq_ib36mIjhpSjks5twynNgaJpZM4Tdp8u> .