The cl_allowdownload enables or disables the auto-downloading of the missing files from the server.
/seta cl_allowdownload 1
Values: “0” or “1”
Default: “0” (not auto-downloading the files from the server)
Setting it to a value of “1” it will automatically download the missing files (map files, setting files) from the server, so you can connect more easily without downloading them manually and copying them into the right folder of the ET installation.