option to store state out-of-volume (mostly untested)

tests/test_httpcli.py

@@ -37,6 +37,7 @@ class Cfg(Namespace):
             nih=True,
             mtp=[],
             mte="a",
+            hist=None,
             **{k: False for k in "e2d e2ds e2dsa e2t e2ts e2tsr".split()}
         )
 

tests/test_vfs.py

@@ -18,8 +18,8 @@ from copyparty import util
 class Cfg(Namespace):
     def __init__(self, a=[], v=[], c=None):
         ex = {k: False for k in "e2d e2ds e2dsa e2t e2ts e2tsr".split()}
-        ex["mtp"] = []
-        ex["mte"] = "a"
+        ex2 = {"mtp": [], "mte": "a", "hist": None}
+        ex.update(ex2)
         super(Cfg, self).__init__(a=a, v=v, c=c, **ex)