Hotfix 10.2.1 - Nextcloud 23.0.10

This is a hotfix to disable flock() on configuration files. In more recent versions of Kubernetes on AKS, the flock() call appears to return an error instead of blocking, so if multiple concurrent requests come in, several will return a cryptic error about a NULL logger back to the client. Similarly, if Nextcloud Cron attempted to run while another request was starting, Cron would fail with the same error.

See #24 for details on this issue.