code: String debugGetAllHttpHdrs(HttpServletRequest req) {
          if (req == null)
              return null;
          StringBuffer sb = new StringBuffer(512);
          Enumeration<String> headerNames = req.getHeaderNames();
          while (headerNames != null && headerNames.hasMoreElements()) {
              String headerName = headerNames.nextElement();
              sb.append(headerName).append("=");
              sb.append("[").append(SRTServletRequestUtils.getHeader(req, headerName)).append("]\n");
          }
          return sb.toString();
      }
docs: Debug method used to collect all the Http header names and values.
  
  @param webAppSecurityCollaboratorImpl TODO
  @param req HttpServletRequest
  @return Returns a string that contains each parameter and it value(s)
  in the HttpServletRequest object.