A script that can be run from cron to sync from LDAP.

As proposed by 'mate' on IRC.  This simple code hopefully also
demonstrates a good general starting point to future PHP scripts
running from the command-line within DAViCal.

scripts/cron-sync-ldap.php

@@ -0,0 +1,33 @@
+#!/usr/bin/env php
+<?php
+/**
+ * Script to sync user data from an LDAP server
+ */
+$script_file = __FILE__;
+if ( $argc < 2 ) {
+
+  echo <<<USAGE
+Usage:
+
+	$script_file davical.example.com
+
+Where 'davical.example.com' is the hostname of your DAViCal server.
+
+This script can be used to synchronise DAViCal from your LDAP server on a regular
+basis to ensure group information is up-to-date.  It's not strictly necessary as
+DAViCal's user data will be updated as soon as a new or updated user logs into
+DAViCal, but it can be useful to synchronise data for people who have not logged
+into DAViCal so that they are visible as potential calendars, for example. 
+
+USAGE;
+  exit(1);
+}
+
+$_SERVER['SERVER_NAME'] = $argv[1];
+
+chdir(str_replace('/scripts/cron-sync-ldap.php','/htdocs',$script_file));
+
+require_once("./always.php");
+
+sync_LDAP();
+sync_LDAP_groups();