ad_cache_robot_useragentsWhat it does:
Caches "User-Agent" values for known robotsDefined in: /web/philip/tcl/ad-robot-defs.tcl
Source code:
    ns_share ad_robot_useragent_cache
    set sub_db [ns_db gethandle subquery]
    set sub_selection [ns_db select $sub_db "select robot_useragent from robots"]
    while {[ns_db getrow $sub_db $sub_selection]} {
	set_variables_after_subquery
	set ad_robot_useragent_cache($robot_useragent) 1
    }
    ns_db releasehandle $sub_db