Postgresql 8.0 and Cancel/Kill backend functions

Does anyone know if such functions have been added to version 8?
I saw lots of discussion while searching google and saw references to
patches applied and docs.

Google link:


http://groups-beta.google.com/group/comp.databases.postgresql.patches/browse_thread/thread/8dc627fdbe4b830d/2b4364d42a95b885?q=Cancel%2FKill+backend+functions+--+docs&_done=%2Fgroups%3Fq%3DCancel%2FKill+backend+functions+--+docs%26qt_s%3DSearch+Groups%26&_doneTitle=Back+to+Search&&d#2b4364d42a95b885