replace xmlrpc server and include example stub, legacy methods not implemented yet. client also needs some work

This reverts commit 30991a0b.
Looks better, but firmware upgrade script changes need to propagate
to the install media first...

... when using the core.git mount hook.  :)

Does not affect the packages/images.

... thus reducing the need for sigkillbypid().  :)

It's ok to write /etc/resolv.conf.