[klibc] bunch of small fixes

[H. Peter Anvin]

Nigel Cunningham wrote:
> 
> Okay. On further reflection, I suppose I don't need to bother with just
> using the signature, so long as I can restore whatever is overwritten.
> Based on that, how about if we say that the signature will start with
> 'TUXONICE' (without the quotes) regardless of what the original
> signature was. I'll store the info that was there elsewhere in that
> block, and put the original contents in the header proper.
> 
> This will apply from the next (3.0-rc6) release.
> 

ASCII magics have a nasty tendency to conflict with text files.  Random 
binary really is a lot better.

My trusty random number generator (a.k.a. ranpwd(1)) is suggesting 
0xedc302e99856e50c.

	-hpa