HTTPCLIENT-1946: handling of 308 status as per RFC 7538

Author: ok2c

httpclient5/src/main/java/org/apache/hc/client5/http/impl/DefaultRedirectStrategy.java

@@ -74,6 +74,7 @@ public boolean isRedirected(
             case HttpStatus.SC_MOVED_TEMPORARILY:
             case HttpStatus.SC_SEE_OTHER:
             case HttpStatus.SC_TEMPORARY_REDIRECT:
+            case HttpStatus.SC_PERMANENT_REDIRECT:
                 return true;
             default:
                 return false;