This broke due to a recent OpenWrt update.

Tested-by: @kokel

While the images are the same that are used for the Bullet M, adding these
copies will help users choose the correct image for their device.

These are identical to the TL-WR941ND (and identify as TL-WR941ND
internally).

The file targets/$GLUON_TARGET/config becomes optional, as many targets
only used it to set the board and subtarget.

Also fix targets without subtarget.

This default to n now by default

These packages are included by OpenWrt by default on this target and don't
need to be specified manually.

Original patch by @MPW1412

Tested-by: @RubenKelevra

The TL-WR741ND will identify itself as a TL-WR740N/ND as well. This is fine as
the images are identical anyways.

This also fixes the TL-WA830RE v1 model name.

final image name is shown as tp-link-tl-wa830re-v10

primary mac is the one printed on the case

Signed-off-by: Alex Eickhoff <alex@artbanause.de>

With a backported patch from the OpenWrt trunk, it is now easy to generate an
equivalent configuration using CONFIG_ALL_KMODS.

The build will take a bit longer because all kernel module packages are actually
built even when they are not included in the image, but adding new targets
becomes a lot easier.

Also, related documentation updates and fixes.

This reverts commit 59ea630e.

This shouldn't affect compatiblity with kernel modules and will allow us to
find out under which hypervisor we're running.

No autoupdater support yet, but that will follow.

Includes a profile for the NETGEAR WNDR3700v4 and WNDR4300v1