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).

branches: 1.5.16;
Move sysproxy support into a separate component, rumpkern_sysproxy,
instead of it being always provided by the rump kernel base. This
move accomplishes two things:

1) it is no longer necessary to provide sysproxy hypercall stubs for
platforms which do not want to use sysproxy
2) it is easier to reason about the security aspects, since configurations
not linking the sysproxy component simply do not support remote
system calls

discussed on rumpkernel-users

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;
test remove signal delivery

Retire h_simpleserver and use rump_server instead.

Add a simple and stress test cases for the rump remote syscall code.
Fun fact: since the server daemonizes into its own process group,
it's not in atf's pgrp. Use rump_sys_reboot() in atf cleanup to
kill the server after the test.

include <stdbool.h> for bool

test remove signal delivery

Retire h_simpleserver and use rump_server instead.

Add a simple and stress test cases for the rump remote syscall code.
Fun fact: since the server daemonizes into its own process group,
it's not in atf's pgrp. Use rump_sys_reboot() in atf cleanup to
kill the server after the test.