Cyrus-imapd not parsing tls-option-strings in imapd.conf

[Patrick Scharrenberg]

Package: cyrus-imapd-2.2
Version: 2.2.13-10

The following config-options from "/etc/imapd.conf" are not used when
invoking cyrus-imapd/pop3d:

    - imap_tls_cert_file
    - imap_tls_key_file
    - pop3_tls_cert_file
    - pop3_tls_key_file

Only  tls_cert_file / tls_key_file is parsed and works, but prevents
using different certificates for imap and pop3.

I also tried the v2.1-style options (tls_imap_cert_file instead of
imap_tls_cert_file, ...) without success.

I'm using etch.

Patrick