Fix PXE boot

-tar fs buffer upgraded to 9Mb
-adding some kernel addons

With this settings i was able to fully boot a gcc2hybrid.
The x86_64 started up to the rocket, but could'nt go into Tracker.

Change-Id: I8f9e1f803f4a918419305bce3068ffce027d2548
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5295
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

Delete config_manager

Change-Id: Ie909c9a22750c33fcb1dd7824e8b3e51c4d86572
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5208
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

Rename ar81xx to atheros81xx.

The other Atheros drivers are "atheros813x" and "atheroswifi",
so renaming this one (which is the oldest of the set) to match
the other two makes sense.

build/jam: Inline HOST_ADD_BUILD_COMPATIBILITY_LIB_DIR where possible.

The "exec" tool can only handle one command with environs set at
the beginning of the line, so now we set the ADD_BUILD_COMPAT...
in this format. This also seems to be a general performance
improvement to builds using real shells, too.

Change-Id: If4b3117651b5475039d5e8116cd3de398582290a

build: Remove ATA build feature references.

The ATA build feature itself was mistakenly removed in the previous
commit, as it should have been removed along with these. Sorry
about that.

drivers/vlance: Remove.

Never included in the build, and entirely superseded by the "pcnet"
driver from FreeBSD.

sis900: Import from FreeBSD 11.2.

This replaces the old Haiku-native driver that was removed in the last commit.
It should support all the same chips that one did, in addition to the SiS 7014,
and the DP83815 also.

I don't have this hardware, so for anyone who does, please test.

Fixes #1657.

ide: Remove old IDE bus + stack.

* Hasn't been used for quite some time
* Everything was ported over to a new ATA stack
some time ago.
* No huge regressions were seen from the new ATA
stack.

Fix build and first runtime problem in network boot

The boot still crashes some time later, but at least it is easier to
test now.

- PackageFS included in the net boot archive
- Tell the system it is booted "from image" when netbooting

Netboot: remove rtl8169 driver from boot archive

This driver was replaced by rtl81xx. Having both in the image results
in conflicts and non-working ethernet.

NetBoot: add the notification module to boot symlinks

- There is no point in having it in the boot image if it can't be used.
- This however does not get the system booting.

Move image definition jamfiles to build/jam/images

Move image definition jamfiles to build/jam/images