Fix deadlock in case of error while loading a config.
Add registry entries for playloads and add the DONE flag for payloads with no processing needed.
Add pload_store support, filtering and improve xmlrpc_monitor api to handle ploads.
Improve filename and unlink the file when done.
Release the payload store after use.
Add mutex/conf to allow reading incomplete ploads.
Add pload ID to the poll response.
Add core.serialPoll2 to poll only specific serial.