/dev/.initramfs copy state before switch_root

[Warren Togami <wtogami-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>]

I have pushed the following changes.

* If netboot, copy /tmp/net.* to /dev/.initramfs/.  Initscripts of your 
distribution or NetworkManager can read the files in this location to be 
aware of prior configured interfaces.  A distribution may choose to do 
something with this information.

* If you specify kernel cmdline "rdcopystate", then all of /tmp/* is 
copied into /dev/.initramfs/.  This could sometimes be useful for 
post-boot examination or debugging.

* net.<interface name>.lease is written containing the DHCP lease, 
because dcbw asked for this for NetworkManager.  Your own tools could 
choose to do something with it or not.

TODO:

* We need something to write out a file like 
/dev/.initramfs/net.eth0.static in the case of a static IP during 
initrd.  I have never used static IP with initrd before.  Are there 
multiple syntaxes to configure static IP?  Others have touched this part 
of the code.

Warren Togami
wtogami-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org
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