busybox udhcp settings/options help

[bch at shroggslodge.freeserve.co.uk]

Hello busybox@ people

I am not familiar with busybox in a way and I am struggling to understand
udhcpd in terms of supporting 'bootp'.  I have been on 'git.busybox' and
looked at the sparse description (plus searched a bit - probably not
enough) and have not been able to get much clarification.

Please can anyone explain what the 'boot_file'  parameter is specifically
for  and what udhcp does with it ?

Also, what is the difference between that 'boot_file' parameter and then
the optional 'opt bootfile <filename>' parameter ?

Are both needed, or just one or the other ?   Why is there two ?

The same goes for the parameter 'sname'  and then the 'opt tftp <name>'  ?
Why two and are both required  etc ?

Thank you for the clarification.
Habs
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