Merge branch '2.2' into 3.0

# Conflicts:
#	CHANGELOG
#	dev-requirements.txt
#	gns3server/compute/qemu/__init__.py
#	gns3server/compute/vmware/__init__.py
#	gns3server/controller/snapshot.py
#	gns3server/crash_report.py
#	gns3server/handlers/api/compute/atm_switch_handler.py
#	gns3server/run.py
#	gns3server/static/web-ui/26.77d4bfd104f37c42e028.js
#	gns3server/static/web-ui/index.html
#	gns3server/static/web-ui/runtime.415291667f70565cd8ef.js
#	gns3server/utils/__init__.py
#	gns3server/utils/images.py
#	gns3server/utils/interfaces.py
#	gns3server/version.py
#	gns3server/web/web_server.py
#	pytest.ini
#	requirements.txt
#	scripts/update-bundled-web-ui.sh
#	setup.py
#	tests/api/routes/compute/test_dynamips_nodes.py
#	tests/compute/builtin/nodes/test_cloud.py
#	tests/compute/docker/test_docker.py
#	tests/compute/docker/test_docker_vm.py
#	tests/compute/dynamips/test_dynamips_manager.py
#	tests/compute/dynamips/test_dynamips_router.py
#	tests/compute/iou/test_iou_vm.py
#	tests/compute/qemu/test_qcow2.py
#	tests/compute/qemu/test_qemu_manager.py
#	tests/compute/qemu/test_qemu_vm.py
#	tests/compute/test_base_node.py
#	tests/compute/test_manager.py
#	tests/compute/test_project.py
#	tests/compute/traceng/test_traceng_vm.py
#	tests/compute/virtualbox/test_virtualbox_manager.py
#	tests/compute/virtualbox/test_virtualbox_vm.py
#	tests/compute/vmware/test_vmware_manager.py
#	tests/compute/vmware/test_vmware_vm.py
#	tests/compute/vpcs/test_vpcs_vm.py
#	tests/conftest.py
#	tests/controller/gns3vm/test_remote_gns3_vm.py
#	tests/controller/gns3vm/test_virtualbox_gns3_vm.py
#	tests/controller/gns3vm/test_vmware_gns3_vm.py
#	tests/controller/test_export_project.py
#	tests/controller/test_gns3vm.py
#	tests/controller/test_import_project.py
#	tests/test_config.py
#	tests/utils/test_asyncio.py
#	tests/utils/test_images.py
#	tests/web/test_response.py

gns3server/utils/images.py

@@ -83,11 +83,9 @@ async def list_images(image_type):
                                 with open(os.path.join(root, filename), "rb") as f:
                                     # read the first 7 bytes of the file.
                                     elf_header_start = f.read(7)
-                                # valid IOS images must start with the ELF magic number, be 32-bit, big endian and have an ELF version of 1
-                                if (
-                                    not elf_header_start == b"\x7fELF\x01\x02\x01"
-                                    and not elf_header_start == b"\x7fELF\x01\x01\x01"
-                                ):
+                                # valid IOU or IOS images must start with the ELF magic number, be 32-bit or 64-bit,
+                                # little endian and have an ELF version of 1
+                                if elf_header_start != b'\x7fELF\x02\x01\x01' and elf_header_start != b'\x7fELF\x01\x01\x01':
                                     continue
 
                             images.append(