Want to implement dhcp option 210 (pathprefix)

Would it be appreciated if I gave it a shot?

I run a project converting a pxe environment based on pxelinux.0 to an uefi compatible one and we make heavy use of this feature: "Note that all filename references are relative to the directory pxelinux.0 lives in." (http://www.syslinux.org/old/pxe.php)

Debugging "pxe" boots with grubnetx64 shows that it tries to load it's config files from the absolute root:

(note that bootx64.efi is a link to grubnetx64.efi.signed)

Mar 19 19:15:53 apc100 in.tftpd[7502]: RRQ from ::ffff:192.168.246.148 filename /macs/01-00-0c-29-5e-72-e3/bootx64.efi
Mar 19 19:15:54 apc100 in.tftpd[7503]: RRQ from ::ffff:192.168.246.148 filename /grub/x86_64-efi/command.lst
Mar 19 19:15:54 apc100 in.tftpd[7504]: RRQ from ::ffff:192.168.246.148 filename /grub/x86_64-efi/fs.lst
Mar 19 19:15:54 apc100 in.tftpd[7505]: RRQ from ::ffff:192.168.246.148 filename /grub/x86_64-efi/crypto.lst
Mar 19 19:15:54 apc100 in.tftpd[7506]: RRQ from ::ffff:192.168.246.148 filename /grub/x86_64-efi/terminal.lst
Mar 19 19:15:54 apc100 in.tftpd[7507]: RRQ from ::ffff:192.168.246.148 filename /grub/grub.cfg
Mar 19 19:15:54 apc100 in.tftpd[7508]: RRQ from ::ffff:192.168.246.148 filename /grub/grub.cfg
Mar 19 19:15:59 apc100 in.tftpd[7509]: RRQ from ::ffff:192.168.246.148 filename coreos_production_pxe.vmlinuz

Further digging reveals a possible solution by using dhcp option 210 which is not implemented yet, apparently.

So, I have a reason, a test environment and the motivation.