Bug#793786: initramfs-tools: fix the broken netconsole feature in initramfs-tools

[Roger Shimizu <rogershimizu@gmail.com>]

+CC: ijc

Forgot to mention the idea of 2nd patch came from ijc's post:
- http://www.hellion.org.uk/blog/posts/debugging-initramfs-over-netconsole/

I'll update the patch to reflect this info commit log later.


Dear ijc,

Thanks for your post!
Hope you don't mind that I polished your code and post in BTS.

Cheers,
Roger