rlm_perl authentication override

[Henry]

Quoting tnt at kalik.net:
> So check the "circumstances" before changing the Packet-Type.

Of course, you are right :p, thanks.

I'm wondering though:  during that small window period when the  
Packet-Type is changed and returned, would it be possible that it  
would affect other sessions running concurrently (separate threads)?   
Presumably the changed Packet-Type would have a limited scope (ie,  
visible to the current executing thread/session only, and not others)?

Regards
Henry