[Dovecot] dovecot crashes

[Geo Carncross]

I'm getting these over and over again in my dovecot [CVS] logs. I'm
using PAM for authentication- something that worked a few weeks ago.

Apr  6 15:22:11 [PAM-env] Unknown PAM_ITEM: <XAUTHORITY>
Apr  6 15:22:11 [dovecot-auth] PAM pam_putenv: delete non-existent
entry; XAUTHORITY

dovecot: Apr 06 15:22:16 Warning: Killed with signal 2
dovecot: Apr 06 15:22:16 Error: child 25731 (imap) killed with signal 2
dovecot: Apr 06 15:22:16 Error: child 27545 (login) killed with signal 2
dovecot: Apr 06 15:22:16 Error: child 20320 (login) killed with signal 2

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