After the next release or two they'll get dropped entirely from the unitsync DLL.
If you have good reasons for these functions to stay please say so before I commit the change.
I myself couldn't find any find any clients which use these functions, and also I'm sure modders wouldn't particularly like the feature these functions are designed for. Besides that, it isn't supported by lobby infrastructure and I've no clue whether they've actually been tested sometime. In other words, enough reasons to deprecate them