Send netboot options over DHCP
Send netboot options over DHCP

Include the "tftp-server-name", "boot-file-name" and "next-server" DHCP
options in DHCP replies.

Give all clients PXELINUX for now. Later, we will need to choose boot file at
least per OS, maybe even per machine.

creideiki/palletjack,creideiki/palletjack,notCalle/palletjack,saab-simc-admin/palletjack,saab-simc-admin/palletjack,notCalle/palletjack