Merge branch '2.2' into 3.0

# Conflicts:
#	dev-requirements.txt
#	gns3server/compute/qemu/qemu_vm.py
#	gns3server/version.py
#	requirements.txt

gns3server/compute/docker/docker_vm.py

@@ -446,6 +446,12 @@ class DockerVM(BaseNode):
                     continue
                 if not e.startswith("GNS3_"):
                     formatted = self._format_env(variables, e)
+                    vm_name = self._name.replace(",", ",,")
+                    project_path = self.project.path.replace(",", ",,")
+                    formatted = formatted.replace("%vm-name%", '"' + vm_name.replace('"', '\\"') + '"')
+                    formatted = formatted.replace("%vm-id%", self._id)
+                    formatted = formatted.replace("%project-id%", self.project.id)
+                    formatted = formatted.replace("%project-path%", '"' + project_path.replace('"', '\\"') + '"')
                     params["Env"].append(formatted)
 
         if self._console_type == "vnc":

gns3server/compute/qemu/qemu_vm.py

@@ -285,7 +285,7 @@ class QemuVM(BaseNode):
             for node in self.manager.nodes:
                 if node != self and getattr(node, variable) == value:
                     raise QemuError(
-                        f"Sorry a node without the linked base setting enabled can only be used once on your server. {value} is already used by {node.name}"
+                        f"Sorry a node without the linked base setting enabled can only be used once on your server. {value} is already used by {node.name} in project {node.project.name}"
                     )
         setattr(self, "_" + variable, value)
         log.info(