Fix renaming IOL hostname replaces %h only in a single place. Fixes #1707

gns3server/compute/dynamips/nodes/router.py

@@ -1532,7 +1532,7 @@ class Router(BaseNode):
             try:
                 with open(self.startup_config_path, "r+", encoding="utf-8", errors="replace") as f:
                     old_config = f.read()
-                    new_config = re.sub(r"^hostname .+$", "hostname " + new_name, old_config, flags=re.MULTILINE)
+                    new_config = re.sub(r"hostname .+$", "hostname " + new_name, old_config, flags=re.MULTILINE)
                     f.seek(0)
                     f.write(new_config)
             except OSError as e:

gns3server/compute/iou/iou_vm.py

@@ -325,7 +325,7 @@ class IOUVM(BaseNode):
 
         if self.startup_config_file:
             content = self.startup_config_content
-            content = re.sub(r"^hostname .+$", "hostname " + new_name, content, flags=re.MULTILINE)
+            content = re.sub(r"hostname .+$", "hostname " + new_name, content, flags=re.MULTILINE)
             self.startup_config_content = content
 
         super(IOUVM, IOUVM).name.__set__(self, new_name)