New sources layout

Change-Id: Ic716f336b7071063997cf5b4dae6d50e0b4631e9
Remove /multiboot

This is just a duplicate of /boot/.temp, and it is not used anymore.

Change-Id: I8a4d6e68829de3ff3628ff0fe15f6d1d0a6b128f
Move all services to /service

This concerns all services, a.k.a drivers, filesystem drivers, network
(inet, lwip, uds) servers, and the system servers.

Change-Id: I626fd15c795e15af42df2d10d47fb4a703665d63
Remove old scripts to check against NBSD

As we have switched to a local git repository containing the NetBSD
reference, at specific points in time, the following scripts are not
anymore useful.

Change-Id: Iec0606a640a73e6ce80ecc5d9ac438daab9f2a1f
Update the default package URL

Change-Id: I1f82f195b5bbc511b54b0598cf55a2231ed20c42
servers/rs: Add sanity check on executable size

RS used to do a stat, and check that the stat was successful, but it
didn't check that the executable was not actually empty.

This patch adds a check to detect file which are smaller than the minimum
ELF size possible.

Change-Id: I22b004084f17e7d395e2c1377add7bc8b51c3d5e