[WIP] fixes for gas10ka / varioxB

treat proxy for io correctly

frappy/lib/asynconn.py

@@ -218,6 +218,8 @@ class AsynTcp(AsynConn):
         except (socket.timeout, TimeoutError):
             # timeout while waiting
             return b''
+        except ConnectionResetError:
+            pass  # treat the same as gracefully disconnected peer
         # note that when no data is sent on a connection, an interruption might
         # not be detected within a reasonable time. sending a heartbeat should
         # help in this case.