fix read-spin on d/c during json post + errorhandling

tests/test_httpcli.py

@@ -56,6 +56,7 @@ class Cfg(Namespace):
             textfiles="",
             doctitle="",
             html_head="",
+            lang="eng",
             theme=0,
             themes=0,
             turbo=0,

tests/test_vfs.py

@@ -36,6 +36,7 @@ class Cfg(Namespace):
             "rsp_slp": 0,
             "s_wr_slp": 0,
             "s_wr_sz": 512 * 1024,
+            "lang": "eng",
             "theme": 0,
             "themes": 0,
             "turbo": 0,

tests/util.py

@@ -128,7 +128,7 @@ class VHttpSrv(object):
 class VHttpConn(object):
     def __init__(self, args, asrv, log, buf):
         self.s = VSock(buf)
-        self.sr = Unrecv(self.s)
+        self.sr = Unrecv(self.s, None)
         self.addr = ("127.0.0.1", "42069")
         self.args = args
         self.asrv = asrv