#43 WinaXe 7.7 FTP Exploit

This adds the [WinaXe 7.7 FTP Exploit](https://www.rapid7.com/db/modules/exploit/windows/ftp/winaxe_server_ready) as well as some newly introduced library functions. Due to squashing not all developers are visible in the history. The involved developers were Stefano Acquaviti, Jens Keim, Roey Regev, Stefan Schmidt and Jonathan Speth.