[sr-dev] Resetting private variables between requests?

Hello, I recall reading somewhere that all private variables (i.e. $var(foo)-style pvs) are reset/destroyed between request_route executions, but I have a suspicion this is not happening - either in some limited cases or perhaps in all cases. I suppose the most telling symptom is that I see no references to either destroy_vars() or reset_vars() functions that are defined in $kamailio/modules/pv/pv_svar.{c,h}. Is this behavior intentional? If so, I'll see what I can do about implementing a mechanism that manually resets (or destroys?) variables with a "$var(all) = $null;"-type of statement (similar to "$uac_req(all) = $null;"), or making a modparam setting that automatically does this. Thoughts welcome. Thanks! Armen