refactor: Move backward compatible argument handling into config loader

src/ankisyncd/__main__.py

@@ -19,11 +19,7 @@ def main():
         "ankisyncd {} ({})".format(ankisyncd._get_version(), ankisyncd._homepage)
     )
 
-    if len(sys.argv) > 1:
-        # backwards compat
-        config = ankisyncd.config.load(sys.argv[1])
-    else:
-        config = ankisyncd.config.load()
+    config = ankisyncd.config.load(sys.argv)
 
     ankiserver = SyncApp(config)
     run_server(ankiserver, config["host"], int(config["port"]))

src/ankisyncd/config.py

@@ -26,6 +26,11 @@ def load_from_env(conf):
 
 
 def load(path=None):
+    # backwards compat
+    if len(path) > 1:
+        path = path[1]
+    else:
+        path = None
     choices = paths
     parser = configparser.ConfigParser()
     if path: