Ignore carddav database errors
Properly generate a PHP /etc/roundcube/debian-db.php file
The group and mode of debian-db.php need to be readable by apache
Merge pull request #185 from jplock/jp-ignore-carddav-db-errors

Ignore carddav database errors
Merge pull request #186 from jplock/jp-roundcube-fixes

Properly generate a PHP /etc/roundcube/debian-db.php file