Add "cron.php" for background jobs. It is named cron.php because more people will recognize the purpose of the file then.

This can happen if the sync client is used before user created the root directory (e.g. through web login) for example.

LDAP: offer option to disable SSL certificate checks. Works around problems with self-signed certificates, for example. However, the best and right way to solve it is always to import the LDAP server cert to the owncloud server, so you it for testing only.

Like to hear wether it works, instead appending LDAPTLS_REQCERT=never to ldap.conf.