sockets Merge Request #1: Improve sockets send implementation by avoiding the copy (open)

The previous send implementation checked whether the amount of bytes in the given array were equal to the amount of elements, which means that it was essentially checking if it is a byte array.
But to send it, the data was interpreted as double, then copied into another buffer, and then sent. This lead to a HUGE memory consumption when sending a lot of data.

Since it is checked whether the data is a bytes-array anyway, interpret it as such and directly use it as buffer to send.