https://roundcube.net/news/2019/11/09/roundcube-1.4.0-released
* `curl` cmd in the test can fail as roundcube returns a http/401 if
unauthorized (and we're explicitly requesting the login form). By
checking if the `persistent_login` plugin is loaded, the assertion is
still valid)
* Use `$argv[0]` to determine install path in the installer script. I'm
not exactly sure why, but it seems as `__DIR__` now resolves symlinks
which breaks the installer if roundcube is in a `buildEnv` with
third-party plugins.
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