Upped read buffer limit to 1m bytes

This accomodates large tx sends of up to 500k bytes.
However they are unlikely to be propogated by your daemon as the
default relay limit it imposes is 100K.

RELEASE-NOTES

@@ -1,3 +1,8 @@
+version 0.7.17
+--------------
+
+- upped read buffer limit to 1000000 bytes.
+
 version 0.7.16
 --------------
 

lib/jsonrpc.py

@@ -101,7 +101,7 @@ class JSONRPC(asyncio.Protocol, LoggedClass):
         # 1000 are treated as 1000.
         self.max_send = 0
         # If buffered incoming data exceeds this the connection is closed
-        self.max_buffer_size = 150000
+        self.max_buffer_size = 1000000
         self.anon_logs = False
 
     def peername(self, *, for_log=True):