Refactor parameter interaction, call it before AppInit2()

src/init.h

@@ -23,6 +23,8 @@ bool ShutdownRequested();
 /** Interrupt threads */
 void Interrupt(boost::thread_group& threadGroup);
 void Shutdown();
+//!Parameter interaction: change current parameters depending on various rules
+void InitParameterInteraction();
 bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler);
 
 /** The help message mode determines what help message to show */