[syslinux] [bug] PXELINUX: hardcoded options from pxelinux-options ignored

[Gene Cumm]

Hardcoded options for PXELINUX (embedded in the pxelinux.0 binary by
pxelinux-options) was introduced in 3.83.  While working on
documentation, I decided to try it on 5.10, verified that 209
(config-file) was set as an after option and saw no change in
behavior.  I then tested the same as a before with no change.  I then
tested 3.86, found it working and tested 4.06 and 4.00 and found them
broken.

--
-Gene