Support selecting a compression type when exporting a project.

gns3server/controller/snapshot.py

@@ -96,6 +96,7 @@ class Snapshot:
         try:
             begin = time.time()
             with tempfile.TemporaryDirectory() as tmpdir:
+                # Do not compress the snapshots
                 with aiozipstream.ZipFile(compression=zipfile.ZIP_STORED) as zstream:
                     await export_project(zstream, self._project, tmpdir, keep_compute_id=True, allow_all_nodes=True)
                     async with aiofiles.open(self.path, 'wb') as f: