upgrade go-msgauth

vendor/github.com/emersion/go-msgauth/dkim/header.go

@@ -83,7 +83,12 @@ func parseHeaderParams(s string) (map[string]string, error) {
 			return params, errors.New("dkim: malformed header params")
 		}
 
-		params[strings.TrimSpace(key)] = strings.TrimSpace(value)
+		trimmedKey := strings.TrimSpace(key)
+		_, present := params[trimmedKey]
+		if present {
+			return params, errors.New("dkim: duplicate tag name")
+		}
+		params[trimmedKey] = strings.TrimSpace(value)
 	}
 	return params, nil
 }

vendor/github.com/emersion/go-msgauth/dkim/query.go

@@ -100,7 +100,7 @@ func queryDNSTXT(domain, selector string, txtLookup txtLookupFunc) (*queryResult
 func parsePublicKey(s string) (*queryResult, error) {
 	params, err := parseHeaderParams(s)
 	if err != nil {
-		return nil, permFailError("key syntax error: " + err.Error())
+		return nil, permFailError("key record error: " + err.Error())
 	}
 
 	res := new(queryResult)

vendor/modules.txt

@@ -10,7 +10,7 @@ github.com/GehirnInc/crypt/md5_crypt
 # github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815
 ## explicit
 github.com/docopt/docopt-go
-# github.com/emersion/go-msgauth v0.6.8
+# github.com/emersion/go-msgauth v0.7.0
 ## explicit; go 1.18
 github.com/emersion/go-msgauth/dkim
 # github.com/ergochat/confusables v0.0.0-20201108231250-4ab98ab61fb1