Case sensitivity in :addresses in sieve vacation scripts

[Julian Kippels]

Hi,

I have recently updated from Dovecot 2.2 to 2.3. Since I have noticed
that vacation responses from sieve are not working the same anymore.
For example, my sieve script looks like this:

 vacation :days 1 :addresses ["Kippels at hhu.de","julian.kippels at hhu.de"]

it used to be that I got a vacation response if I sent a mail to
kippels at hhu.de and Kippels at hhu.de. Now I only get a response for
Kippels at hhu.de, not for kippels at hhu.de.
I cant say for sure, but I suppose this behaviour changed with the
update. If not, why could this have happened? And in any case, how can
I enable case insensitivity?

Thanks
Julian