mke2fs: get device topology values from blkid

mke2fs: get device topology values from blkid

Handle automatic selection of stride/stripe:

mke2fs 1.41.9 (22-Aug-2009)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=16 blocks, Stripe width=32 blocks
...

And warn on block device misalignment:

mke2fs 1.41.9 (22-Aug-2009)
/dev/sdc1 alignment is offset by 32256 bytes.
This may result in very poor performance, (re)-partitioning suggested.
Proceed anyway? (y,n)

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>