Change the start of restore process so that the archive file can
be passed as a pathnamehash pointing to the Moodle file object,
rather than only as a filename in the temporary directory. This
avoids making an unnecessary copy of the archive file, which can
take a long time (and potentially cause a timeout) in the case
of multi-gigabyte backups.
New PARAM_COMPONENT, PARAM_AREA and PARAM_PLUGIN + fixing of hopefully all current incorrect parameter types. This should help with diagnosing of incorrectly named 3rd party plugins too.