* Support to activate/deactive network connection state replication in Qemu.
* Possible fix for problem connecting to the GNS3 VM. Ref https://github.com/GNS3/gns3-gui/issues/2969 #1760
* Option to reset or not all MAC addresses when exporting or duplicating a project.
* Fix bug when changing properties for closed project. Fixes #1754
* Fix issues with crash reporting & bump version to 2.2.9dev2. Ref https://github.com/GNS3/gns3-server/issues/1758
* Lock listing VMs. Ref #1755
* Try to fix error when listing Hyper-V VMs. Ref #1755
* Catch VirtualBox errors when listing VMs. Fixes #1759
* Deprecate running with Python 3.5
* aiocontextvars is only necessary for Python < 3.7
* Replace Raven by Sentry SDK. Fixes https://github.com/GNS3/gns3-server/issues/1758
* Require setuptools>=17.1 in setup.py. Ref https://github.com/GNS3/gns3-server/issues/1751 This is to support environmental markers. https://github.com/pypa/setuptools/blob/master/CHANGES.rst#171