Wrong TFTP path

The default ROOT TFTP path is "/var/lib/tftpboot". However, when we are using an external DHCP server, the standard pxelinux.0 path is "pxelinux.0".

Having the defaults, PXE Booting wouldn't work because there's no "pxelinux.0" under "/var/lib/tftpboot". This means that we would have to change the DHCP server to tell the path as "maas/pxelinux.0". However, this is undesired as it is a non-default path.

Now, if we edit "/etc/maas/pserv.yaml", and set the tftp option of:
tftp:
  root: /var/lib/tftpboot/maas

would not require DHCP server reconfiguration as it would look for "pxelinux.0" under "/var/lib/tftpboot/maas". However, the issue is that when it looks for the images, it continues to prepend the "maas" path, hance, PXE Booting continues to fail with:

"could not find kernel image: maas/amd64/generic/precise/commissioning/linux"

== Possible Solution ==
A possible solution would be to set the default root path for tftp as:
"/var/lib/tftpboot/maas"

And the images should be accessed as
"<arch>/generic/precise/commissioning/linux"

And NOT

"maas/<arch>/generic/precise/commissioning/linux""