public static URI normalizeQuietly(final String requestUri) {
        return CacheKeyGenerator.normalize(requestUri);
    }
Lenient URI parser that normalizes valid {@link URI}s and returns {@code null} for malformed URIs.
@since 5.2
httpclient5-cache/src/main/java/org/apache/hc/client5/http/impl/cache/HttpCacheSupport.java