UserScoreFactor sets the effect of user defined scores
when they are mixed with usual scores calculated by mnoGoSearch.
UserScoreFactor is to be used with a number in the range
0..255, in combination with a
The default value is 0, which means the user defined scores are not taken
into account and the final score values depend only on the internal scores
as calculated by mnoGoSearch.
255 means maximum effect of user defined values.