making protected constant again public (#2509)

Author: tulinkry

opengrok-indexer/src/main/java/org/opengrok/indexer/web/PageConfig.java

@@ -101,7 +101,10 @@ public final class PageConfig {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(PageConfig.class);
 
-    protected static final String OPEN_GROK_PROJECT = "OpenGrokProject";
+    // cookie name
+    public static final String OPEN_GROK_PROJECT = "OpenGrokProject";
+
+    // query parameters
     protected static final String PROJECT_PARAM_NAME = "project";
     protected static final String GROUP_PARAM_NAME = "group";