remove SillyAdditionControlPackageRuleGenerator

replaced by AdditionControlPackageRuleGenerator
package rules: optionally merge acceptor compounds

... of the same type, only AND and OR

OR(a,OR(b,AND(AND,c))) -> OR(a,b,AND(c))
add-policy rule gen: merge acceptor compounds

... by default
overlay/abccontrol: convert_str()
add-policy rule gen: BitmaskMapCreator

creates a "bitmask" -> "acceptor chain" map, which means that the addition
control pkgrule generator is mostly done now, except for some cleanup.
All steps have been implemented, what remains to be done is integrating it
in the package rule system and roverlay.defaultscript (+argparser etc.).