[2218] Don't upcase the first label when inserting into NSEC3 tree

This is no longer required as tree.find() works without it.

src/lib/datasrc/memory/memory_client.cc

@@ -325,15 +325,8 @@ public:
             }
         }
 
-        // Make just the NSEC3 hash label uppercase, and insert the
-        // entire name into the NSEC3Data ZoneTree.
-        string fst_label = rrset->getName().split(0, 1).toText(true);
-        transform(fst_label.begin(), fst_label.end(), fst_label.begin(),
-                  ::toupper);
-        const string rest = rrset->getName().split(1).toText(true);
-
         ZoneNode* node;
-        nsec3_data->insertName(mem_sgmt_, Name(fst_label + "." + rest), &node);
+        nsec3_data->insertName(mem_sgmt_, rrset->getName(), &node);
 
         RdataEncoder encoder;
 

src/lib/datasrc/memory/tests/zone_finder_unittest.cc

@@ -280,15 +280,8 @@ public:
              }
         }
 
-        // Make just the NSEC3 hash label uppercase, and insert the
-        // entire name into the NSEC3Data ZoneTree.
-        string fst_label = rrset->getName().split(0, 1).toText(true);
-        transform(fst_label.begin(), fst_label.end(), fst_label.begin(),
-                  ::toupper);
-        const string rest = rrset->getName().split(1).toText(true);
-
         ZoneNode *node;
-        nsec3_data->insertName(mem_sgmt_, Name(fst_label + "." + rest), &node);
+        nsec3_data->insertName(mem_sgmt_, rrset->getName(), &node);
 
         // We assume that rrsig has already been checked to match rrset
         // by the caller.