Command line switches

I'm after a list of the command line switches for citect32.exe (and their function)

I can see /x is the recommended option for terminal server deployments, but I'm not sure what it actually selects.

I've seen /i allows for a different ini file to be specified.

/r:xxxxx where xxxx is the name of the function allows for only that function to be started.

I've also seen /d, but I don't know what it does.

I've searched the official documentation, but this seems to be missing from it. Also tried google, but various combinations of command line switch, options etc. have revealed little.