cwRsync update - 5.7.4

cwRsync - Rsync for Windows

Version 5.7.4 is a cwRsync client focused release, in where we have upgraded OpenSSH to 8.0p, LibreSSL to 2.9.1 and Cygwin DLL to 2.11.1. Installers with 32-bit binaries are not provided any longer as a part of our product. Our installers require now entering an Itefix key during the installation. Please contact us if you don't have such a key.