Centralize the base rump libraries into a variable used by all the other
Makefiles so that we can make changes to it centrally as needed and have
less mess. Fixes the sun2 build that needs rumpvfs after librump after
the latest changes.

Deal with fallout from the addition of
KERN_PROC_CWD in sysctl(3)
That is kern.proc.$$.KERN_PROC_CWD (I think - not that it matters here)

The effect is that -lrump now requires -lrumpvfs

This set of changes fixes (I believe) regular dynamic builds,
more might be required for static builds (will be verified soon).

Get rid of all the -lrumpdev and -lrumpvfs that are no longer needed
after moving rump's mainbus from rumpdev to rumpkern.

Produces the same atf-run results as before.

branches: 1.9.14;
Move get_lladdr to net_common.sh

And this one also needs librumpvfs

More need for librumpdev

branches: 1.6.2;
Add tests for IPv6 ICMP redirect

Note that tests for redirect timeout doesn't work for now due to
PR kern/50240.

From s-yamaguchi@IIJ (with some fixes and tweaks by ozaki-r)

Add tests for ICMP redirect timeout

Fix static linking for the tests: -lrump is also used by -lrumpuser,
so we also need -lrump after -lrumpuser. Fixes build for sun2.

branches: 1.3.12; 1.3.22;
Add another version of the simple ping test, this time written as a
shell script and using rump_server, rump.ifconfig and rump.ping.

XXX: uses rump_allserver for now, though, since i noticed a problem
where the rump kernel syscall vector does not get updated for
dlopen()'d libraries (and hence if you dlopen librumpnet.so, socket()
still gives ENOSYS). Me be fixink it later.

test that kernel reponds to ping

Add test case for PR kern/43548

Due to the nature of the feature under test, this one is a little
different, so let me explain how it works.

The test program forks and bootstraps a rump kernel in both processes.
It then configures shared memory interfaces in both. shmif is nice
in that it uses a mmaped file as the bus and does not require root
privileges for communication between two (or more) processes. The
child process then proceeds to increase icmp.returndatabytes as
indicated by the PR, while the parent process sets the global TTL
of the rump kernel to 1 (note: both values only affect the respective
rump kernels, not each other or more importantly the host kernel).
The parent then sends the bad packet which is supposed to be routed
by the child. If ip_icmp.c was too old, *boom* + fail; otherwise
nothing bad happens and the test exists with success after one
second.

Eventually this test can be extended into a framework for automated
testing of any networking code which requires (arbitrarily complex)
routing setups.