code: public String getAbsoluteRfsPathRelativeToWebInf(String path) {
  
          if (path == null) {
              return null;
          }
          // check for absolute path is system depended, let's just use the standard check
          File f = new File(path);
          if (f.isAbsolute()) {
              // apparently this is an absolute path already
              return f.getAbsolutePath();
          }
          return CmsFileUtil.normalizePath(getWebInfRfsPath() + path);
      }
docs: Returns an absolute path (to a directory or a file in the "real" file system) from a path relative to
  the "WEB-INF" folder of the OpenCms web application.<p>
  
  If the provided path is already absolute, then it is returned unchanged.<p>
  
  @param path the path (relative) to generate an absolute path from
  @return an absolute path (to a directory or a file) from a path relative to the "WEB-INF" folder