so do byte-swapping on big-endian system. The byte-swap routines are in
fsck/bswap.c because they will also be used in fsck_ffs in future.
Tested on i386 and sparc.
* deprecate register
* cleanup manpage
* remove unused docheck()
* getopt returns -1 not EOF
* put a ) in the correct place in a printf, so that the argument gets
& 0xff, not the result of printf() itself...