Simple Down for Maintenance

for osCommerce Online Merchant v2.2

Features: 1 - Simple installation: 2 minor file edits, 1 file copy, a few SQL statements. 2 - Administrative on/off for "Downing" the store 3 - Admin-configurable warning message (also on/off) (not timed) to avoid surprising customers by "downing" the store suddently 4 - Admin IP address exception - - you can enter in your IP address to still browse the store while everyone else sees it as "down"