Use qCInfo for anything that has general value for support and
development. Use qCWarning for any recoverable error and qCCritical
for anything that could result in data loss or would identify a serious
issue with the code.
Issue #5647
This gives more insight about the logs and allow setting fine-tuned
logging rules. The categories are set to only output Info by default
so this allows us to provide more concise logging while keeping the
ability to extract more information for a specific category when
developping or debugging customer issues.
Issue #5647
There were two issues:
* With the refactoring of how Folder and SyncEngine relate, the
ignore_hidden_files flag on the CSync context was reset after
each sync run and not updated from the configuration again.
* The folder watcher failed to enumerate hidden folders and thus
didn't watch for changes inside them. (linux only)
