Add command line option parser to replace getopt

Signed-off-by: Daniel Phillips <daniel@phunq.net>
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Suppress sparse warning for ptr-subtraction-blows

sparse warns if structure is not power-of-two, and using pointer
subtraction. This seems to be useless.

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Convert tux3.c to new options parser

This adds help and usage autogenerate and other conveniences
Separate command line parsing from tux3 filesystem operations

Signed-off-by: Daniel Phillips <daniel@phunq.net>
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
vtable-disable-for-now

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
atable-flush-fix

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
writeback-sort-inodes

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
cursor_redirect-alloc-order-fix

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
dleaf2-fix-allocation-order

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>