code: public void addLink( final String path, final String target, int permissions, String username, String groupname) throws NoSuchAlgorithmException, IOException {
  		contents.addLink( path, target, permissions, username, groupname);
  	}
docs: Adds a symbolic link to the repository.
  
  @param path the absolute path at which this link will be installed.
  @param target the path of the file this link will point to.
  @param permissions the permissions flags
  @param username user owner of the link
  @param groupname group owner of the link
  @throws NoSuchAlgorithmException the algorithm isn't supported
  @throws IOException there was an IO error