[Security-Acl] Missing docs (about updateUserSecurityIdentity() method) in 2.7, 2.8, 3.x series

[felipsmartins]

Browsing on Symfony ACL related issues, I found this PR: #8650 ([Security][Acl] Add MutableAclProvider::updateUserSecurityIdentity) and its related documentation for new method: PR #3319

However, this doc update entry appears only in the doc pages of symfony 2.6 but not in 2.7, 2.8, 3.x doc pages. Look:

As this entry is an important note, why it was removed from documentation? Maybe a mistake? I've noticed "2.5 versionadded" has removed since this commit: Removed 2.5 versionadded as its deprecated

[xabbuh]

Thank you very much for spotting and reporting this issue @felipsmartins. You are right that we should keep this information (we always remove versionadded for EOLed versions in the master branch and sometimes, like with this one, we miss that there was more important information in them that we have to keep).

I opened #6100 to fix this.