Description:
------------
The doc for yp_err_string() says:

  yp_err_string --  Returns the error string associated with 
  the previous operation
  Description
  string yp_err_string ( void)

which is obviously wrong, as the code below shows.

I think it is meant to be something like

  yp_err_string --  Returns the error string associated with
  the given error code
  Description
  string yp_err_string (int errorCode)

because yp_err_string(yp_errno()) just works fine.

Best regards
  Niklas

Reproduce code:
---------------
$yp = @yp_match("nomap", "norDomain");
if (!$yp) {
  echo "Error: " . yp_err_string();
}


Expected result:
----------------
printout:

  Error: Can't bind to server which serves this domain 

Actual result:
--------------
printout:

  Warning: Wrong parameter count for yp_err_string()