get_device_by_label.c: Add call to ext2fs_find_block_device if we
can't find the device using the name given by /proc/partitions. (This
can happen if devfs is compiled into the kernel, but not mounted.)
get_device_by_label.c (has_right_label): Fixed bug where code used a
strncmp to compare a binary UUID value which may contain a NULL.
Fixed GCC warnings; added const to char * typed variables. Eliminated
non-portable use of u_char.
fsck.c: Added support for LABEL= and UUID= specifications for the
filesystem's device, to match what recent mount programs can support.
Also, close stdin when doing fsck -A or when checking more than one
filesystem at a time, so that e2fsck doesn't try to ask interactive
questions if the filesystem appears to be mounted.
get_device_by_label.c: New file added to support LABEL=foo and
UUID=bar type specifications.