fix tests and readme

tests/test_httpcli.py

@@ -29,6 +29,9 @@ class Cfg(Namespace):
             v=v or [],
             c=c,
             rproxy=0,
+            rsp_slp=0,
+            s_wr_slp=0,
+            s_wr_sz=512 * 1024,
             ed=False,
             nw=False,
             unpost=600,

tests/test_vfs.py

@@ -31,6 +31,9 @@ class Cfg(Namespace):
             "no_voldump": True,
             "re_maxage": 0,
             "rproxy": 0,
+            "rsp_slp": 0,
+            "s_wr_slp": 0,
+            "s_wr_sz": 512 * 1024,
         }
         ex.update(ex2)
         super(Cfg, self).__init__(a=a or [], v=v or [], c=c, **ex)