public void addPrivilegedServlet(String pathSpec, ServletHolder holder) {
    addServletWithAuth(pathSpec, holder, true);
  }
Adds a servlet in the server that only administrators can access. This method differs from
{@link #addUnprivilegedServlet(String, ServletHolder)} in that only those authenticated user
who are identified as administrators can interact with the servlet added by this method.
hbase-http/src/main/java/org/apache/hadoop/hbase/http/HttpServer.java