[HttpFoundation] Add a way to avoid the session be written at each request
feature#9119 [HttpFoundation] Add a way to avoid the session be written at each request (adrienbrault)

This PR was merged into the master branch.

Discussion
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[HttpFoundation] Add a way to avoid the session be written at each request

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no (maybe the DI config ?)
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | N/A
| License       | MIT
| Doc PR        | https://github.com/symfony/symfony-docs/pull/3017

Commits
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191418d [HttpFoundation] Add a way to avoid the session be written at each request