all_searches cron script

Updates the PIE all resources page when run as a cron job e.g. once a day

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

PDL - note that the loops are different even though the PDL is the same, because
the type of search is different and that makes the parameters different

Read config file
Require PIE modules needed - error, shared and rdb utilities (last connects to
resource database)
Get list of resource type searches from resource_type table of resource database
Get list of subject searches from subject table of resource database
Connect to PIE database
Delete existing searches and their results (from item table and search table)
Foreach resource type
    Set up search title
    Set up search parameters (creating a faked up CGI object)
    Call savesearch routine
    Delete search parameters CGI object
Foreach subject
    Set up search title
    Set up search parameters (creating a faked up CGI object)
    Call savesearch routine
    Delete search parameters CGI object
Foreach letter (A-Z)
    Set up search title
    Set up search parameters (creating a faked up CGI object)
    Call savesearch routine
    Delete search parameters CGI object
Foreach age (7,30) days since resource created
    Set up search title
    Set up search parameters (creating a faked up CGI object)
    Call savesearch routine
    Delete search parameters CGI object
Ensure searches are readable by all
Disconnect from resource database
Disconnect from PIE database
Exit

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