close messages to lmfl-format opened streams. dont search for filemark if status is :eof.
free the dma buffer and other deinits before searching for filemark.

magtape list files has not unwind protect, therefore the seting plist to nil in ::close.
doesnt have the required effect in case of abort.

however Reusing the *selected-format* without sending it some kind of :clearup message
sounds like a bad idea. does it have to be reused? just recons it each time needed.

Functions depend on variables that arent set until the tape frame is created.
*selected-format* (rewind et al)
*default-disk-unit* tape:restore-files

The saved-plist stuff in lmfl-format is troublesome:
 * functions such as fs:mt-rewind send a :rewind message directly
  to the device, out from under the lmf-format handler that may
  be pointing to that device. Any side effect like out must
  reset the format in some way.