Preserve GIT_PROXY_COMMAND. See #10.
 Update test_ip, issue #11

- added run script for qemu
- added readme.txt
We set the UPE/MPE bits in RCTL. Messing with the receive filters should not be necessary. See #11
disable loopback part of the ip_test

Since loopback support in lwip port of NUL is not enabled, it shouldn't work
(but does on qemu and not on hardware).

Fixes #11
rename iptest script, only for manual usage
Solely restrict creation of SCs on NUL

On NUL solely SC creation is restricted and enforced. PT, EC, PD and SM can be
created by everybody in the system. This commit partially fixes #14. The better
approach as suggested by @udosteinberg requires a bit rework of the
sigma0-child bootstrap procedure.

Patches are welcome.
Use latest NOVA kernel release

Adjust exception_word number. Doing it more dynamic requires a bit code
rework.

Patches are welcome.

Fixes #13
iprelayd: Properly close connections

This is to not leave stale connections in CLOSE_WAIT state indefinitely.
novaboot: Some fixes from Nils (NRE)
novaboot: Add --strip-rom option

This is needed for NRE.