Replace *MD5SUM with *HASH, replace MD5 hashes with SHA256

Signed-off-by: Felix Fietkau <nbd@nbd.name>

This reverts commit 8c68c104.
It is used for apm821xx, which needs ext2 (not ext4) images for some
devices.

Signed-off-by: Felix Fietkau <nbd@nbd.name>

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>

SVN-Revision: 45518

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>

SVN-Revision: 44285

This patch series is extracted from
http://ftp.de.debian.org/debian/pool/main/g/genext2fs/genext2fs_1.4.1-4.debian.tar.gz



The patches are used in Debian for quite a long time, so I assume that
this is solid material. At least, my Ubuntu host fsck.ext4 does not bark :-)

The goal is to allow building filesystems with larger blocksizes instead of the
current default of 1k. This should improve performance and lifetime when the
filesystem is stored e.g. on a SD card (on Raspberry Pi/I2SE Duckbill for example)
which uses internal flash memory. Writing to flash memory is slow because writing
the data of one block results in erasing a whole erase block of the flash memory.
Thus it is preferable to align the filesystem block size on a flash device with
the erase blocksize, or at least bring it closer to the later one, to avoid
unnecessary write amplification.

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

SVN-Revision: 40921

SVN-Revision: 33140

SVN-Revision: 33093

tools/genext2fs: do not include the host getline.h, it breaks the tool in subtle ways, and the source already has a getline replacement

SVN-Revision: 30479

SVN-Revision: 29754

SVN-Revision: 15242

SVN-Revision: 14610

SVN-Revision: 14536

Use the only working sourceforge.net mirror for gentext2fs, the others are ever not synchronised or timing out

SVN-Revision: 13066

SVN-Revision: 9899