doc bugfix: ZMQ_MSGMORE should be ZMQ_SNDMORE

doc/zmq_setsockopt.txt

@@ -446,7 +446,7 @@ ZMQ_ROUTER_RAW: switch ROUTER socket to raw mode
 Sets the raw mode on the ROUTER, when set to 1. When the ROUTER socket is in
 raw mode, and when using the tcp:// transport, it will read and write TCP data
 without 0MQ framing. This lets 0MQ applications talk to non-0MQ applications.
-When using raw mode, you cannot set explicit identities, and the ZMQ_MSGMORE
+When using raw mode, you cannot set explicit identities, and the ZMQ_SNDMORE
 flag is ignored when sending data messages. In raw mode you can close a specific
 connection by sending it a zero-length message (following the identity frame).
 

doc/zmq_socket.txt

@@ -354,10 +354,10 @@ socket identity using the ZMQ_IDENTITY zmq_getsockopt call.
 To close a specific client connection, as a server, send the identity frame
 followed by a zero-length message (see EXAMPLE section).
 
-The ZMQ_MSGMORE flag is ignored on data frames. You must send one identity frame
+The ZMQ_SNDMORE flag is ignored on data frames. You must send one identity frame
 followed by one data frame.
 
-Also, please note that omitting the ZMQ_MSGMORE flag will prevent sending further
+Also, please note that omitting the ZMQ_SNDMORE flag will prevent sending further
 data (from any client) on the same socket.
 
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