The contents of ?etc/owncloud/config.php are:

<?php
$CONFIG = array (
'instanceid' => 'ocro12y8044t',
);
<?php
$CONFIG = array (
'dbtype' => 'mysql',
'dbname' => 'owncloud',
'dbuser' => 'owncloud',
'dbpassword' =>SOME HASH
'dbhost' => '127.0.0.1:3308',
'dbtableprefix' => 'oc_',
'instanceid' => 'ocvkvy5z46kb',
'passwordsalt' => ANother HASH
'secret' =>and a really long Hash',
'trusted_domains' =>
array (
0 => 'MySite',
1 => '192.168.1.1',
2 => '174.56.178.55',
3 => '192.168.2.1',
4 => 'piwik.MySite',
5 => '',
6 => 'photos.MySite',
),
'datadirectory' => '/var/clearos/owncloud/data',
'overwrite.cli.url' => 'https://localhost/owncloud',
'version' => '10.2.0.5',
'logtimezone' => 'UTC',
'installed' => true,
'updatechecker' => 'false',
'ldapIgnoreNamingRules' => false,
'loglevel' => 2,
'maintenance' => false,
);

END
I did substitute some phrases for sensitive info. I think the actual config.php is generated elsewhere in /usr/clearos directories. There are a lot of backups in the /etc/owncloud/ directory