[sr-dev] Restructure module docs

Hi! Some READMEs have grown and some lists over modparams and/or functions are long and not ordered in any logical way - new items are added below the rest and it has become a bit messy in my humble point of view. Would anyone have anything against me starting to reorganise a few - or join in - so that they are easier to go through? Alfabetical or some logical grouping. Sorting by alfabetical will split apart groups like database table name settings, so one has to be careful ;-) Maybe we can add subheaders when there are more than X modparams? Or shall we leave them the way they are? /O