Description:
------------
ibase_connect() refuses to connect to a local file, giving the following error:

-902 : Unable to complete network request to host "localhost". Failed to establish a connection. Connection refused

I have checked /etc/services based on other bug reports and have the correct line in there :

$ grep gds /etc/services
gds_db          3050/tcp # InterBase server
gds_db          3050/udp


Reproduce code:
---------------
<?php

  $loc = 'localhost:/home/user/FOO.GDB';
  $un  = 'SYSDBA';
  $pw  = 'masterkey';

  $conn = ibase_connect($loc,$un,$pw);
  if (!$conn)
  { 
    die(ibase_errcode()." : ".ibase_errmsg()."\n");
  }
  ibase_close();
?>


Expected result:
----------------
A more descriptive error message, or silent exit depending on the status. Anything but 'connection refused'.

Actual result:
--------------
-902 : Unable to complete network request to host "localhost". Failed to establish a connection. Connection refused