Add case-insensitive flag to `MDBIndex`

consul/mdb_table.go

@@ -51,6 +51,7 @@ type MDBIndex struct {
 	IdxFunc         IndexFunc // Can be used to provide custom indexing
 	Virtual         bool      // Virtual index does not exist, but can be used for queries
 	RealIndex       string    // Virtual indexes use a RealIndex for iteration
+	CaseInsensitive bool      // Controls if values are case-insensitive
 
 	table     *MDBTable
 	name      string

consul/state_store.go

@@ -179,6 +179,7 @@ func (s *StateStore) initialize() error {
 			"id": &MDBIndex{
 				Unique: true,
 				Fields: []string{"Node"},
+				CaseInsensitive: true,
 			},
 		},
 		Decoder: func(buf []byte) interface{} {