[BusyBox] Add mkdosfs tool (mkfs.msdos) [PATCH]

[Steven Scholz]

Hi Jason,

> I recently needed to be able to format fat32 volumes on my embedded
> system.  I have attached a patch that adds this support to busybox.
> It is based on the mkdosfs application from the dosfstools package.
> It is installed as mkfs.msdos.

Can you tell us something about memory usage of your applet please.

The original mkdosfs allocates the _whole_ (!!!) FAT before writing it to disk. 
Although it is mainly all set to zero.
This means you can _not_ format large disks (some gigabytes) on an embedded 
system with only e few megabyte RAM ...

--
Steven