Refactor config package

cmd/after-lock/after-lock.go

@@ -18,11 +18,11 @@ import (
 
 
 type afterLockConfig struct {
-	INITIAL_DELAY int
-	LOOP_DELAY int
-	LOCK_PATH string
+	INITIAL_DELAY int `optional`
+	LOOP_DELAY int `optional`
+	LOCK_PATH string `optional`
 	LOG_PATH string
-	PRINT_STACKTRACES bool
+	PRINT_STACKTRACES bool `optional`
 }
 
 var configuration = afterLockConfig{
@@ -46,7 +46,7 @@ func init() {
 
 func main() {
 	defer handleErrors()
-	err := config.Build("AFL", &configuration)
+	err := config.NewBuilder().Build("AFL_", &configuration)
 	if err != nil {
 		panic(err)
 	}