udhcp: add PXELINUX config file option (code 209) definition

This change adds a definition for DHCP option 209. RFC 5071 defines code
209 as a configuration file for a PXE bootloader; this change uses
the string "pxeconffile" as its text identifier.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2 files changed