Var_SetExpand
Var_SetExpand(SCOPE_GLOBAL, argvalue, "1");
void Var_SetExpand(GNode *, const char *, const char *);
Var_SetExpand(scope, name, "");
Var_SetExpand(scope, name, evalue);
Var_SetExpand(scope, name, output);
Var_SetExpand(scope, name, uvalue);