ChangeLog, tune2fs.c:

ChangeLog, tune2fs.c:
  tune2fs.c (remove_journal_device): If the force flag is given, tune2fs
  	will remove the journal device information from the superblock even if
  	tune2fs failed to open the journal device or otherwise other failed to
  	remove the filesystem from journal device.
  	(parse_tune2fs_options): Fix -j option so that it works (it was
  	missing the open_flag being set to EXT2_FLAG_RW).
  	(main): Accept "-U clear" to set a null UID.