[GLOP] improve internals

ortools/glop/parameters.proto

@@ -25,7 +25,7 @@ option java_package = "com.google.ortools.glop";
 option java_multiple_files = true;
 option csharp_namespace = "Google.OrTools.Glop";
 
-// next id = 69
+// next id = 70
 message GlopParameters {
   // Supported algorithms for scaling:
   // EQUILIBRATION - progressive scaling by row and column norms until the
@@ -480,4 +480,8 @@ message GlopParameters {
   // evaluating large constraint with variables at their bound shouldn't cause
   // any overflow.
   optional double max_valid_magnitude = 199 [default = 1e30];
+
+  // On some problem like stp3d or pds-100 this makes a huge difference in
+  // speed and number of iterations of the dual simplex.
+  optional bool dual_price_prioritize_norm = 69 [default = false];
 }