Fix marshalling of TLSVersion

Signed-off-by: Julien Pivotto <[email protected]>

Author: Julien Pivotto

config/http_config.go

@@ -80,12 +80,9 @@ func (tv *TLSVersion) UnmarshalYAML(unmarshal func(interface{}) error) error {
 	return fmt.Errorf("unknown TLS version: %s", s)
 }
 
-func (tv *TLSVersion) MarshalYAML() (interface{}, error) {
-	if tv == nil || *tv == 0 {
-		return []byte("null"), nil
-	}
+func (tv TLSVersion) MarshalYAML() (interface{}, error) {
 	for s, v := range TLSVersions {
-		if *tv == v {
+		if tv == v {
 			return s, nil
 		}
 	}
@@ -106,12 +103,9 @@ func (tv *TLSVersion) UnmarshalJSON(data []byte) error {
 }
 
 // MarshalJSON implements the json.Marshaler interface for TLSVersion.
-func (tv *TLSVersion) MarshalJSON() ([]byte, error) {
-	if tv == nil || *tv == 0 {
-		return []byte("null"), nil
-	}
+func (tv TLSVersion) MarshalJSON() ([]byte, error) {
 	for s, v := range TLSVersions {
-		if *tv == v {
+		if tv == v {
 			return []byte(s), nil
 		}
 	}