- the filter "install_handler" should return with the documented filter results. Otherwise, the installer returns an error (tries to access non-existing tables) when the browser asks for /favicon.ico (many thanks to Michael Aram for reporting this)
- the error with accessing favicon.ico (previous commit) happens during ad_returnredirect; change it to ns_returnredirect
- use tcl 8.5 idioms
- use tcl 8.5 idioms