* sami/mkfs.bfs:
docs: add long options to mkfs.bfs.8
mkfs.bfs: coding style fix
mkfs.bfs: include-what-you-use header check
mkfs.bfs: validate numeric user inputs
mkfs.bfs: use xstrdup from xalloc.h
mkfs.bfs: add long options
mkfs.bfs: use libc error facilities