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Updated Mattermost to 4.8.0

I've tested Mattermost 4.8.0 with the latest version of GitLab's master branch as of this morning. It was officially released on March 15th from https://about.mattermost.com/download/.


Full release notes are here. The config changes that affect Team Edition for this release are:

  • Under ServiceSettings in config.json:
    • Added AllowCookiesForSubdomains, to ensure that the domain parameter is set for cookies, which allows the browser to send the cookies to subdomains as well.
    • Added WebsocketURL, which allows the server to instruct clients where they should try to connect WebSockets to.

Mattermost 4.8.0 contains no security fixes that need to be backported to previous releases.

Edited by GitLab Release Tools Bot

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