More robust handling of imported ADIF records

Some logging  applications export the  BAND ADIF field  with uppercase
characters. This  change makes  sure that  the internal  worked before
lookup indexes use uppercase throughout when fields that can come from
external sources are stored.

logbook/AD1CCty.cpp

@@ -159,8 +159,9 @@ public:
   {
   }
 
-  Record fixup (QString const& call, prefix const& p) const
+  Record fixup (QString call, prefix const& p) const
   {
+    call = call.toUpper ();
     using entity_by_id = entities_type::index<id>::type;
     entity_by_id::iterator e;   // iterator into entity set