Fixed bug #98151: Do not try to recall a diskonly file. Also improved logging...

Fixed bug #98151: Do not try to recall a diskonly file. Also improved logging of cases where we do not find any segment for a file that should be recalled. Distinguish the case with no segment at all (logged a critical, with note that the file is lost) and the case where all segments are disables (warning only). Also list all disabled segments in the log with the reason for their unavailability (segment status and tape status)