e2image.c, mke2fs.c, mklost+found.c, tune2fs.c, util.c, uuidgen.c: Fix
gcc -Wall complaints, including one bug in tune2fs caused by a block
automatic shadowing version of the variable we really wanted to use,
which broke the logic testing to see if the filesystem was mounted.
ChangeLog, MCONFIG.in:
(gcc-wall-new): Added new target which forgoes the make clean so we
only check the newly modified .c files.
imager.c (ext2fs_image_{inode,super,bitmap}_{read,write}, ext2_fs.h,
Makefile.in: New file that has routines that save ext2fs metadata to a
file.
ext2_err.et.in (EXT2_ET_MAGIC_E2IMAGE): New error code assigned.
e2image.h: New file which defines the file format for the ext2 image
file. (Saved copy of ext2 metadata to a file as a saving throw
against worst-case damage.)
ChangeLog, Makefile.in, e2image.c:
e2image.c, Makefile.in: New program which saves ext2 metadata to a
file for people who need a last-ditch saving throw.