Allow numbers in domain name

bifrost/views.py

@@ -40,7 +40,7 @@ def update_view(request):
 
 
 def load(file):
-    exp = re.compile(r"^([a-z.]+):([0-9]{1,3}(?:\.[0-9]{1,3}){3})$", re.I)
+    exp = re.compile(r"^([a-z1-9.]+):([0-9]{1,3}(?:\.[0-9]{1,3}){3})$", re.I)
     if not os.path.isfile(file):
         return {}