* Makefile.am, configure.ac: Added new test loopback which shows how to
use the loopback interface. Thank you Eric Norum for a portable
target independent test which exercises the TCP/IP. This should
prevent massive failures in the TCP/IP stack from reaching the
street.
* loopback/.cvsignore, loopback/Makefile.am, loopback/README,
loopback/init.c, loopback/loopback.scn: New files.
