update_searches cron script

Updates searches saved by PIE users

Input: none
Output: none unless run in debug mode
None-PIE modules used: CGI, DBI, Time::Local

PDL

Read config file
Require PIE modules needed - error, shared and rdb utilities (last connects to
resource database)
Connect to PIE database
Get list of saved searches from search table
Foreach search
    Next if search is on all resources page
    Calculate no of seconds after which search refreshed
    Next if time to refresh search not reached
    Delete existing results
    Get list of resources to search from search_resources table
    Get information about search item from item table
    Set up search parameters (as faked up CGI object)
    Call savesearch routine
    Delete CGI object
Disconnect from resource database
Disconnect from PIE database
Exit

File also contains copy of ParseXML and ReadConfig subroutines (see UIG.pdl)