pruning: fix YAML representation of PruneKeepRegex

config/config.go

@@ -218,7 +218,7 @@ type PruneKeepLastN struct {
 
 type PruneKeepRegex struct { // FIXME rename to KeepRegex
 	Type  string `yaml:"type"`
-	Regex string `yaml:"prefix"`
+	Regex string `yaml:"regex"`
 }
 
 type LoggingOutletEnum struct {
@@ -341,7 +341,7 @@ func (t *PruningEnum) UnmarshalYAML(u func(interface{}, bool) error) (err error)
 		"not_replicated": &PruneKeepNotReplicated{},
 		"last_n":         &PruneKeepLastN{},
 		"grid":           &PruneGrid{},
-		"prefix":         &PruneKeepRegex{},
+		"regex":          &PruneKeepRegex{},
 	})
 	return
 }