This method has six variants:
*:int Assign(char const *variable, {quote:MyString} &value)
*:int Assign(char const *variable,char const *value)
*:int Assign(char const *variable,int value)
*:int Assign(char const *variable,float value)
*:int Assign(char const *variable,double value)
*:int Assign(char const *variable,bool value)

In new {quote:ClassAds}, InsertAttr() is a direct equivalent set of
methods. The only differences are the return type (int vs. bool) and new
{quote:ClassAds} don't have float or {quote:MyString} variants.

A simple search-and-replace or set of pass-through functions will work.
In the former case, some call sites may need to be fixed up because of
the change in return type. For the {quote:MyString} variant, we can try adding a
cast operator to std::string or const char* in {quote:MyString}.

Developer time: 1-2 hours, some student time for search-and-replace fixup

Progress: Done (added compatibility function)