In order to avoid name conflicts with WorkerTaskContext
- renamed WorkerTask::log to WorkerTask::log_message
Note: Methods have different fuction signatures
Also renamed WorkerTask::warn to WorkerTask::log_warning for
consistency reasons.
Use the task_log!() and task_warn!() macros more often.
So callers get more stable results. Most noticeable, the disk list in
the web UI doesn't jump around upon reloading, and while sorting could
be done directly there, like this other callers get the benefit too.
Signed-off-by: Fabian Ebner <f.ebner@proxmox.com>