netclient for win7

Content: I have successfully built netclient for Windows 7 using a modified Go 1.25 toolchain that restores the missing syscalls in legacy Windows. This allows Win7 users to enjoy the latest netclient features without being stuck on Go 1.20.

I'm maintaining the binaries and the source for this bridge here: https://github.com/slok2024/netclient/releases/tag/1.4.0