Revert "peer: reduce write timeout to 10s"

This reverts commit db2c104111.

peer.go

@@ -44,8 +44,8 @@ const (
 	// idleTimeout is the duration of inactivity before we time out a peer.
 	idleTimeout = 5 * time.Minute
 
-	// writeMessageTimeout is the timeout used when writing a message to a peer.
-	writeMessageTimeout = 10 * time.Second
+	// writeMessageTimeout is the timeout used when writing a message to peer.
+	writeMessageTimeout = 50 * time.Second
 
 	// readMessageTimeout is the timeout used when reading a message from a
 	// peer.