// This routine creates a link to the file $file from the file handled by $pt
// checking first if $file exists and if it doesnt it creates it
// with the message: Data not yet processed. etc...
// Returns true if sucessful (ie file was there or copying worked, false 
// otherwise
//
// Inputs:
// $full_path: name of file to check (to access it from the program calling 
// the links routine)
// $rel_path: path to same file but from the file the link is placed into
// $pt: valid file handle to a file open for writing
// $text: string, containing linked text
//
// Calls:
// ch_page_exists.php
//
// Written by Suzanne Aigrain on 05-Jan-2001

(See /home/xmmssc/soft/php/links.php)