* Move member vars to correct place, to match it with the engine.
* Added out-of-band network message ID's for the R5 engine.
Also implemented 'ServerDataBlockSender::SendDataBlock()' and 'ClientDataBlockReceiver::AcknowledgeTransmission()'. NOTE that these are currently not tested, and also not in use! The code uses the version stored in the vftable which is what the engine itself provides. These have been implemented for reference only. If they need to be used, they need to be thoroughly tested first!
This patch partially rebuilds the data block sender/receiver. The receiver leaks memory if the sender sends a bogus LZ4 packet, it would allocate memory to copy the encoded data into, from which it would decode it to the scratch buffer, but it would never deallocate this temporary buffer is the LZ4 decoder failed. This has been fixed. The second reason to rebuild these was to look into potential compression optimization. The data block rebuild now also features the latest LZ4 codec.
Originally, we store the search results in a CMemory instance which we then assign to the actual function pointer. CMemory is just a pointer class; we can assign the results directly to the actual function pointer. This commit reduces a lot of code verbosity, and also reduced roughly 2KiB worth of static pointers in the resulting executable. This commit also officially deprecates the support for any GameDLL's below S3 (Season 3), since it makes more sense to port the assets from earlier/later games back to the version this SDK supports.
