revise API: unexport DefaultValue for now
diff --git a/gcfg.go b/gcfg.go
index b097163..d0385d7 100644
--- a/gcfg.go
+++ b/gcfg.go
@@ -74,7 +74,7 @@
 
 const (
 	// Default value string in case a value for a variable isn't provided.
-	DefaultValue = "true"
+	defaultValue = "true"
 )
 
 type gbool bool
@@ -219,7 +219,7 @@
 				} else if vq != nil {
 					name, value = string(vq[1]), string(vq[2])
 				} else { // vd != nil
-					name, value = string(vd[1]), DefaultValue
+					name, value = string(vd[1]), defaultValue
 				}
 				err := set(config, *sect, sectsub, name, value)
 				if err != nil {