Documentation for kolab.conf

[Brady, Mike]

Where is the documentation for kolab.conf?

Apart from stopping my logs from filling up with messages complaining 
about missing/incorrect options it would be good to know what everything 
does.

Specifically I have many, many, many log entries about:
- missing ldap/modifytimestamp_format
- missing ldap/auth_cache_uri
- missing imap/virtual_domains
- invalid kolab_smtp_access_policy cache_uri