don't trigger update from checkPassword, it is already  called by userExists, this is enough.

do not write to database when the value is the same

add test cases. also split test classes in a file each, looks like only the first class is being executed

also appconfig shall not write to database if the value is unchanged

Set default collation of mysql connection to utf8_bin
Set utf_bin as default collation for new tables

If not we are most likely in CLI mode. However to be able to still
generate valid URLs, we need to use the overwrite webroot instead.

Fix #9490

The intention of the original commit 12f7cb87
was to fix tests. But cron should always return a valid host not localhost.

Reload the files app in case of authentication errors, expired tokens or disabled app

Reloading will triger the full server side handeling of those errors

formatting

fix missing semicolon + some jshint warnings

* fixes #6945

Also separate the function into getDefaultPageUrl() and
redirectToDefaultPage() to make it testable.

If a default app isn't visible for the user, try the next one.
Else fallback to the "files" app.