util: Make NetworkClient use vectored I/O so the length tag and payload are in the same TCP packet.
util: Make NetworkClient use vectored I/O so the length tag and payload are in the same TCP packet.

pizcogirl/Astron,blindsighttf2/Astron,blindsighttf2/Astron,pizcogirl/Astron,ketoo/Astron,pizcogirl/Astron,blindsighttf2/Astron,blindsighttf2/Astron,ketoo/Astron,ketoo/Astron,pizcogirl/Astron,ketoo/Astron