- Large rewrite of switch code. Instead of having switch parameters in

the (monstrously large) system structure, there is now a global
  'switchdata' structure originating in switches.c. This makes it much
  easier to see what's happening.
  * Note: although this code has been tested, there might be some
    hiccups, because doing multiple search&replace actions over all
    files is bound to cause some problems.

src/mgu.c

@@ -17,7 +17,7 @@
 
 //! Internal constant. If true, typed checking
 /**
- * Analoguous to sys->match
+ * Analoguous to switches.match
  * 0	typed
  * 1	basic typeflaws
  * 2	all typeflaws
@@ -26,7 +26,7 @@ static int mgu_match = 0;
 
 extern Term TERM_Hidden;
 
-//! Set mgu mode (basically sys->match)
+//! Set mgu mode (basically switches.match)
 void
 setMguMode (const int match)
 {