Appends a table to the current net message. Adds 16 extra bits per key/value pair so you're better off writing each individual key/value as the exact type if possible.
All net messages have a 64kb buffer. This function will not check or error when that buffer is overflown. You might want to consider using util.TableToJSON and util.Compress and send the resulting string in 60kb chunks, doing the opposite on the receiving end.