Add RemoteAddress to mirrors (#26952)

This PR adds a new field `RemoteAddress` to both mirror types which
contains the sanitized remote address for easier (database) access to
that information. Will be used in the audit PR if merged.

modules/util/url.go

@@ -39,3 +39,12 @@ func URLJoin(base string, elems ...string) string {
 	}
 	return joinedURL
 }
+
+func SanitizeURL(s string) (string, error) {
+	u, err := url.Parse(s)
+	if err != nil {
+		return "", err
+	}
+	u.User = nil
+	return u.String(), nil
+}