Neos bugfix releases: 2.1.15, 2.2.11, 2.3.9, 3.0.1

Today three new bugfix releases have been done. All fix a number of bugs and inconveniences.

@kdambekalns Unfortunately ChangeLog links are broken

More probably: they are not yet split out and rendered (Jenkins has 5 split jobs in the queue right now). Just give it some time. :slight_smile: