[Files Plugin] Upcoming changes in Files plugin version 4

[marty]

In the upcoming master release and in the next major release (version 4), account security will be updated and the following changes will be introduced:

Changes

• Files plugin requires sodium and distributions that ship php <7.2 out of the box are no longer build.
• A new config option FILES_ACCOUNTSTORE_V1_SECRET_KEY is introduced. Default: empty. link to config
• The Files plugin will not work when this option is empty.

Old configs: FILES_PASSWORD_KEY and FILES_PASSWORD_IV will still work for older accounts if configured, but note if the old options are removed, we cannot decrypt older accounts. Therefor make sure you’ve made a backup of those keys.

Version 3 packages will still be available and get occasional updates, for now.