Add state and signal to catch the following two known problems:
* Linux: inotify user watch pool is exhausted. Folder watcher becomes
unreliable.
* Windows: buffer is too small, some notifications are lost but watching
stays reliable.
This is motivated by the fact that QMetaObject::noralizeSignature takes 7.35%
CPU of the LargeSyncBench. (Mostly from ABstractNetworkJob::setupConnections and
PropagateUploadFileV1::startNextChunk). It could be fixed by using normalized
signature in the connection statement, but i tought it was a good oportunity
to modernize the code.
This commit only contains calls that were automatically converted with clazy.
When synchronizing a folder on a samba share, creating files that begin
with ._ is often forbidden. This prevented the client from creating
its ._sync_abcdef.db file.
Now, it'll check whether the preferred filename is creatable, and if
it isn't it'll use .sync_abcdef.db instead.
The disadvantage is that this alternative path won't be ignored by
older clients - that was the reason for the ._ prefix.
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)
